To ejaculate in a woman's hair and then throw her down a flight of stairs.
"That chick took the Mexican Avalanche like a pro-skier." or "I Mexican Avalanched her twice and she still came back for more."
This takes place when you are enjoying felatio from your lover on the 2nd story or higher in a building. You pull out at money time, and fire a frozen rope of dick snot into her face, temporarily blinding her. At this time, your partner would be further incapacitated, so you could utilize this opportunity to smash a taco in her face, either hard or soft shell. (soft shell is suggested for long term relationships, hard shell for one-nighters). At that time, you inform her you'll walk her to the bathroom to clean up, at which point you throw her down the stairs and yell "Avalanche Amigos!!!"
Beatrice was being a bit of a pain in the butt yesterday, so after we came home from the bar and taco bell, I gave her a Mexican Avalanche. She should be back at work by next Thursday.
cum on a bitches face.... then shove her down a flight of stairs.
Drew: I just gave L.Dub a mexican avalanche.
Jay: I hope she has insurance.
The action of cumming in your girlfriends hair and firing her down the steps.
Jenna made me so mad last night we watched a porno then I gave her a Mexican avalanche.
to have sex with a pregnant woman, & then throw her down the stairs.
you took that mexican avalanche like a champ. bye-bye, baby.