The horn of a car.
More specifically, the act of parking in front of the house of someone that you are picking up and blasting the horn to let them know you are there.
Implies that you are too cheap/broke to get a real cell phone.
"Dude, man.. Whoever is in front of apartment A needs to lay off his Mexican cell phone. It's 6:30a.m. That shit is annoying!"

by U. Dontneedthat May 4, 2008
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Being to cheap to afford a real cell phone, you go to the toy section in Wal-Mart and buy a 2 way walkie talkie.
Pedro, can you hear me? Testing, Testing! Jose I can hear you - our Mexican Cell Phone works!
by Pedro L. December 29, 2007
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