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4.
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.
by Masterchef1 February 27, 2009
 
1.
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."
by Big Deezy February 21, 2003
 
2.
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.
by Bunk-Bed Woody September 18, 2009
 
3.
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.
by half insane April 23, 2009
 
5.
to have sex with a pregnant woman, & then throw her down the stairs.
you took that mexican avalanche like a champ. bye-bye, baby.
by 123456homo. February 08, 2009