1. A hooded woven cotton sweat shirt popular amongst hippies and frat boys in the 1980s, often with the Corona beer logo printed on the front.

2. The top five cards off the deck, which must be beaten when only one player stays in in a drop or match-the-pot poker game. So named because five random cards are just as likely to beat you as the hand of a stupid hippie or frat boy. If a player loses to the Mexican sweater, then he must match the pot and the game continues.
Not so fast--you still have to beat the Mexican sweater.
by Siggie February 3, 2007
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Putting hot sauce in a condom before having sex, so that it kills the sperm, to keep the female from impregnating herself with the condom afterwards.
I'm glad I went through with the Mexican Sweater when I was with that bitch Sharon. I'm not paying alimony to that hoe.
by Entrapment Evasion 101 April 11, 2022
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When a woman has her vagina worn to the point where it appears to have folded inside out and has been left like this for some time. Giving it a dark appearance.
i was totally gonna do that chick till i saw her Red Mexican Sweater
by 141ello December 31, 2016
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