Top Definition
(noun) the buttocks, or in some cases, the butthole. It is made to sound like the spanish equivalent to buns, but in fact is not spanish at all.
Boss: "Have you finished those reports yet!?!
Guy: "How about you shove it up your buniertos!!"

Girl on subway: "AHH! Someone just grabbed my buniertos!!"

Girl: "Who are you going to vote for mayor?"
Guy: "I don't give a rat's buniertos who wins"
by Daze80 February 15, 2006

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