1. The act of shitting, though not completely out, but predominantly into one's own ass crack and pressing the ass cheeks together to complete the effect. For a complete "Mexican effect," commit this act after the Dirty Sanchez.
2. An insult which is an image comparable to a person who is described as such.
1. Last night Mia was rough! I fucked her in the ass, and gave her a stank Dirty Sanchez. With that upset, she followed up with an ass taco.
2. For fuck's sake, Howard, stop being such an ass taco!
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