When a Jewish individual has a slight creasing in the genitalia area due to too tight of gym shorts.
Person #1: look at that little fucker with a big moose knuckle!
Person #2 Hey look at that! It seems to be the outline of a slightly burnt bagel. He’s a dirty jew! Lets get our banks back! That’s a Jew knuckle!!
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