A Prehistoric Donkey (4-legged hoofed animal) from the southwest or south of the border.  Fossilized Remains of it were discovered by archaeologists at or near the La Brea Tar Pits.
On wikipedia. Type in the following key words: "La Brea Tar Pits"  Scroll down Until you see a list of all of the prehistoric animals including the "Mexican Ass," that archaeologists found the remains of.
by Aaron Ferber January 4, 2009
 Get the Mexican Assmug.
Get the Mexican Assmug. by L G Miller May 5, 2007
 Get the Mexican Assmug.
Get the Mexican Assmug. A good old fashion Mexican Ass Gasket is when the stall you happen to be going #2 in is out of Ass Gaskets so you have to use the rim of your sombrero (by tearing off the top) as an Ass Gasket.
by Zodaxyz August 9, 2018
 Get the mexican ass gasketmug.
Get the mexican ass gasketmug. Initial steady stream of shit disbursed through the anus ( usually accompanying sever anal burning) whilst on the toilet after a hefty meal of Mexican food.
"I was so sick after I ate five tacos at that Mexican restaurant, talk about a Mexican Ass Fountain!
by James Casey & Matt Druken May 22, 2008
 Get the Mexican Ass Fountainmug.
Get the Mexican Ass Fountainmug. Oh man, I gave her a Mexican Ass-mash last night, and when I was finished, her ass-hole was deep, dark purple. It was awesome!
by liamisawesome1111 November 18, 2015
 Get the Mexican Ass-mashmug.
Get the Mexican Ass-mashmug. 1. (n.) An irresistibly gorgeous latino.
2. (n.) A dude that takes your breath away when a half-cocked smile graces his luscious lips a.k.a. a 'Pac Moment'.
3. (n.) Joe from Texas.
2. (n.) A dude that takes your breath away when a half-cocked smile graces his luscious lips a.k.a. a 'Pac Moment'.
3. (n.) Joe from Texas.
1. "I met this FINE ASS MEXICAN GUY in the parking lot and DAMN i had a 'Pac-Moment' cuzz he took my breath away.... "
2. "I met Joe from Texas & he so hot that I was stupefied. I tripped over my stilettos tryina give him my digits!"
2. "I met Joe from Texas & he so hot that I was stupefied. I tripped over my stilettos tryina give him my digits!"
by thaREAL-ESTone November 8, 2020
 Get the fine ass mexican guymug.
Get the fine ass mexican guymug. When you’re eating a guys ass after eating Green Chile, then vomit in his hole. He then shits it out into a cup and it is eaten.
Person 1: I gave him the The New Mexican Ass Blast last night!
Person 2: I wish somebody would let me do that.
Person 2: I wish somebody would let me do that.
by Edward Santiago Brown May 6, 2025
 Get the The New Mexican Ass Blastmug.
Get the The New Mexican Ass Blastmug.