It's when a chick stands over you and pisses in your mouth then sticks a tiny straw in your salt-rimmed mouth and drinks it all before saying "Jamaican me crazy!"
Liquid diariah caused by eating really spicey or greasy Mexican food, gives the victim stomach cramps and the urgent need to find a toilet before their asshole explodes.
After eating at a Mexican restaraunt Bill had to hurry home because he felt a Tiajuana juicebox coming on and he didn't want toshit his pants.