Having intercourse on Halloween, and/or doing so while wearing costumes.
"Dude, i Just engaged in a Mexican Halloween with this random chick. I was Ace Ventura and she was Wonder Woman or some shit."
by Maddzstep August 22, 2011
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Popularized by the program Two And A Half Men (Season 9, Episode 10, The war against gingavitis):
The act of performing a drug deal with someone of mexican descent.
Berta's doorbell rings, she hands over a package, receives some cash in exchange and says "gratsias, adios".
Alan asks what that was about, Berta replies "It's Mexican Halloween".
by JT The Super Greek November 11, 2012
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Noun.

A shared, festive sexual experience where both sexes eat signature mexican delicacies off each others entrepiernas (crotches) while simultaneously listening to "Spanish Flea", "Monster Mash", "Jarabe Tapatío" y "Thriller"
Pedro: Hola José nunca te lo creerás
(You'll never believe this)

José: ¿Que?
(What?)

Pedro: La esposa y yo tuvimos relaciones sexuales anoche
(The wife and I had sex last night)

José: ¿Cómo es eso tan difícil de creer?
(How's that so hard to believe)

Pedro: Hicimos el Halloween mexicano
(We did the Mexican Halloween)

José: ¡Ai! *Se desmaya*
(He faints)

Pedro: Sí, mi esposa tuvo la misma reacción. Incluso me llamó Speedy Gonzáles.
(Yeah, that was my wife's reaction. She even called me Speedy Gonzales.)
by PseudoFrank August 27, 2021
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The sexual act in which the female is so unattractive that the male partner requires her to wear the sheet over her head, giving her the appearance of a ghost, as he munches upon her pink taco.
She would only go down on me if I returned the favor, but that bitch was so ugly, I had to resort to the Mexican Halloween.
by earlgrae November 4, 2009
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Having a girl ride your dick (because we all know Mexicans are lazy) and have her wear a pumpkin on her head, as you cum, you smash another pumpkin, into her pumpkin, breaking them both or just one depending on how hard you hit her.
I gave that bitch a Mexican Halloween last night.
by YahookaIRCkr3w May 20, 2010
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Having sex while the woman is on a toilet, pooping.
"Dude, she's a freak"
"Why?"
"She wanted me to have a Mexican Halloween with her"
"Ew"
by Frendle W October 29, 2009
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1. The act of painting your penis orange and yellow, then while having a girl deep throat your cock you piss down her throat shouting "trick or treat!"

2. With a candy corn cock (Orange and yellow paint) you fuck and piss in any orifice on a girl. Finished with a casual "trick or treat"
"Eat the candy bitch, it's a Mexican Halloween"
by Candy Corn Cock November 6, 2009
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