Se Compran Colchones: What Mexico's Street Calls Actually Mean

My first week in Mexico City I lay in bed at 8 in the morning listening to a woman’s voice, warped and enormous, listing objects at me from a moving vehicle. I could not catch a single word. I assumed it was political.

It was a guy in a pickup truck who wanted my old microwave.

Almost every recorded call you hear on a Mexican street is one of seven things: a scrap buyer, a camote cart, a gas truck, a tamal vendor, a water truck, a knife sharpener, or a barrel organ. The most famous of them, the loudspeaker chanting se compran colchones, is not selling you anything. It is buying your dead refrigerator.

Nobody explains this to you. You live inside it for a few weeks, quietly building a private theory about each sound, and most of your theories are wrong.

So here is the decoder.

The seven sounds, in one table

Learn the table and the city stops being ambient noise. It becomes a schedule.

The camote whistle is the one worth putting shoes on for.

Se compran colchones: the most famous recording in Mexico

Here is the full text, which you will eventually be able to recite in your sleep whether you want to or not:

• Se compran colchones, tambores, refrigeradores, estufas, lavadoras, microondas, o algo de fierro viejo que vendan.
  We buy mattresses, drums, fridges, stoves, washing machines, microwaves, or any old metal you're selling.

The key word is se compran, not se venden. They buy. You sell. Almost every foreigner gets this backwards for the first month and quietly wonders why a truck is trying to sell mattresses to an entire street at 8 am.

Fierro is the everyday Mexican word for iron, the one people actually use instead of hierro.¹ So fierro viejo is old metal, scrap, the category that covers your ruined blender and the bed frame in the stairwell. Tambores here does not mean drums you play - it means the big metal drums used as containers.

The truck is usually a battered pickup with a loudspeaker bolted to the roof. It circles the same streets for years.

And the voice is a child’s. It belongs to María del Mar Terrón Martínez, who recorded the list around 2005, when she was eight or nine, for her father Marco Antonio, a scrap buyer who wanted a cassette instead of a voice he had to wreck all day.² It took them most of a night to get a clean take.³ Someone copied the tape, then someone copied that, and it spread across the whole country. There are remixes. There are ringtones. There is a version people play at weddings.

If you want to sell them something, you do not need a speech:

• ¡Joven! Traigo un refri viejo.
  Hey! I've got an old fridge.
• ¿Cuánto me da por esto?
  How much will you give me for this?

Do not expect real money. Expect it gone, which is often worth more.

The camote cart, or why there is a train in your street at 9 pm

This one confused me the longest. A locomotive whistle, at night, in a neighborhood with no train tracks, holding one impossible note for eight or nine seconds.

It is a sweet potato cart.

Camote is sweet potato, a word that comes from Nahuatl⁴ and is completely standard in Mexico.⁵ The cart carries a sealed wood-fired oven, and the pressure that builds up inside gets released through a steam whistle. The whistle is not a gimmick bolted on for charm. It is the oven venting, and the vendor controls it.

The cart bakes camote and plátano macho, plantain, until both collapse into something jammy. Then it gets drowned in condensed milk.

• ¿Me da un camote con leche condensada?
  Can I get a sweet potato with condensed milk?
• Uno de plátano, porfa.
  One plantain one, please.

It arrives scalding, in a plastic bag or a foam cup, and it is the correct thing to eat while standing on a cold street doing nothing else.

El gaaas: the truck that keeps your kitchen alive

Most Mexican homes cook with LP gas, not electricity. Either you have a swappable cylinder, el cilindro or el tanque, or a fixed rooftop tank, el estacionario, that gets refilled from a hose.

So the gas truck is not a novelty. It is infrastructure with a loudspeaker.

You will hear a man’s voice dragging the vowel out - el gaaaas - sometimes with the company name attached. If your shower goes cold mid-soap, that truck is now the most important vehicle in your life.

Ask about card payment before they start. Plenty of trucks are cash only, and discovering that at the end is a bad time for everybody.

Tamales oaxaqueños: the bicycle that arrives when you are already in pajamas

At night, usually after 8, a different recording rolls past. Softer, tinnier, on a loop, coming from a bicycle or a tricycle cart with a steel pot strapped to it. Something close to:

• Ricos y deliciosos tamales oaxaqueños, tamales calientitos.
  Rich, delicious Oaxacan tamales, nice hot tamales.

Tamales oaxaqueños are wrapped in banana leaf rather than corn husk, which makes them wider, softer, and a little more dramatic. The usual fillings are mole, verde, rajas with cheese, and dulce.

Ordering is fast, so keep it short:

• ¿Me da dos de mole y uno de rajas?
  Can I get two mole and one rajas?
• ¿Tiene de dulce?
  Do you have sweet ones?

If they also carry atole, get one. It is a warm corn drink and it is the entire point of the night version.

The water truck and the garrafón ritual

Plenty of people in Mexico do not drink the tap water, so drinking water arrives as a garrafón, a big 20-liter jug.⁶ The truck announces itself with a horn, a recording, or a guy shouting el agua.

The important part is that it is a swap, not a purchase. You hand over the empty and pay only for the water inside.

• Le cambio el vacío, por favor.
  I'll trade you the empty one, please.
• ¿Me deja dos garrafones?
  Can you leave me two jugs?
• ¿Me lo sube al tercero? Le doy para el refresco.
  Could you carry it up to the third floor? I'll tip you.

That last one matters more than your Spanish does. A full garrafón weighs about twenty kilos and stairs are stairs.

The knife sharpener’s pan flute

No words at all. Just a short, breathy descending melody on a pan flute, repeated, getting closer.

That is the afilador, the knife sharpener.⁷ He rides a bicycle rigged so the pedals drive a grinding wheel, props it on a stand, and does your knives on the sidewalk while you wait. Scissors too.

• ¿Me afila estos cuchillos?
  Can you sharpen these knives?
• ¿A cómo el cuchillo?
  How much per knife?

The flute is the oldest trick in the list. It carries over traffic, it costs nothing to operate, and it means the same thing to everyone on the block without a single word being said.

The organillero, who is selling nothing

In the Centro Histórico and around the Alameda you will hear a barrel organ: wheezy, slightly out of tune, cranked by hand by a man in a beige uniform and cap.

That is an organillero.⁸ He is not a vendor. He turns the handle, a second person walks the crowd with a hat, and you tip if you enjoyed it. The instruments are genuine antiques, most of them built in Germany a century ago, and the trade is treated as part of Mexico City’s street culture rather than as busking: the city’s culture ministry ran a safeguarding process with the organillero associations to have the oficio declared intangible cultural heritage.⁹

• Le dejo para el organillo.
  Here's something for the organ.

Coins are normal and welcome. Filming a full song and walking off is the move that gets you a look.

How to stop any of them

The mechanics are the same for all seven, and they are simpler than you think.

Joven is the workhorse. It literally means young man, and it gets used for anyone from nineteen to sixty-five, which is one of the kinder small habits in Mexican Spanish.

Do not chase the vehicle. Do not apologize for existing. Step out, make the noise, say four words. The whole exchange takes fifteen seconds, and after a week or two you will do it without translating anything in your head.

Then one evening you will be inside, half asleep, and you will hear a long steam whistle two streets over and think, without any effort at all: camote.

That is the moment the noise turns into a neighborhood.