It is when a dumb Serbian named Igor looks at a t-shirt that has a picture of a rooster on a block. This of course means Cock block and Igor thinks it is a square rooster.
Hey nice shirt!
yeah man nice shirt!
Vat is dis Square Rooster?
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