Mexican Ass 

When your ass crack gets all slimy, sweaty and stinky because you didn't wipe good enough.

I took a shit this morning and went to the gym. Now I need to wipe because I have Mexican Ass.

Mexican Ass by L G Miller May 5, 2007

Mexican Halloween

Popularized by the program Two And A Half Men (Season 9, Episode 10, The war against gingavitis):
The act of performing a drug deal with someone of mexican descent.

Berta's doorbell rings, she hands over a package, receives some cash in exchange and says "gratsias, adios".
Alan asks what that was about, Berta replies "It's Mexican Halloween".

Mexican Halloween by JT The Super Greek November 10, 2012

mexican lasagna

beans in a girl's pussy.
black beans, if she's african.

Shaun: "Our friend Jenni told us about her mexican lasagna."
Greg: "Black?"
Shaun: "No, lima."

mexican lasagna by Timothy Emanuel II May 21, 2009

Mexican tuxedo

The unseemly ensemble of a denim jacket worn with blue jeans.

"Are those Chuck Taylors?"
"I don't know, but she's wearing a Mexican tuxedo."

Mexican tuxedo by B. Building May 15, 2006

mexican facepaint 

you take a dump on a girls chest and use your weiner as a paintbrush and the poop as paint and paint the girls face

I totally gave some girl some mexican facepaint

mexican facepaint by j-manbingo May 24, 2008

Mexican French Kiss 

When one attempts to perform a "Mexican Chipmunk" but instead, due to the mexican food, lets loose a stream of liquid feces into the partner's mouth

Dude, I was totally going to give this girl a Mexican Chipmunk, but my stomach was upset and I gave her a Mexican French Kiss instead.

Mexican French Kiss by MrCharizard August 11, 2009

Mexican Taint 

The precise area between the punani and the precious
of a Spaniard. (Mexican)

Aye, Muchachos.
I want to rub my face all ova dat Mexican Taint!

Mexican Taint by JeFams November 15, 2010