Aclarando por que luego la gente se me alebrestaaaaa.
Ok people, slangs vary from region to region like in any place in the world. So with that said, slangs used in Mexico City, wont be the same used in for example Monterrey or Culiacán.
So lets use some general ones:
Tacos al Pastor: this name is used a lot in the center and south, if you are in Northern Mexico "Tacos de trompo" is whats used
Cheleando: Again south but in Northern Mexico is Pisteando and for a single drink Pisto
Refresco: Southern for Soda, in Monterrey for example they call it simply Soda