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The act of beating a friend senseless during his birthday. This custom is very common with young men of Mexican descent.
Dude 1: "Hey man, did you know it's chiquito's birthday today?"
Dude 2: "Orale holmes, let's give him a good birthday beatdown after school."
Dude 1: "Si-mon, make sure he doesn't skip 6th period to run home like a little bitch."
by Da Vin Chee December 22, 2009
The act of a group of people beating up a friend on his birthday.
"happy Birthday mark!" followed by his birthday beatdown
by RangaX1337 September 07, 2011