Pinche Culo is Spanish that litteraly translates to "fucking asshole". It can even be used as a term of endearment when used between friends and used either with a smile on your face or even with a "pissed off" look.
Hey "pinche culo", don't be talking to my sister that way! " or "Pinche Culo, you drank all the beers! you didn't even pitch in bro"
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi