Holding up your middle finger; also known as "flipping the bird", and giving someone "the finger". Mainly used by large-assed women driving Ford Windstar vans, with large bangs.
"Did you see that haggardredneck lady in the rusted-out soccer mom van? She really gave that bitch in the Taurus the ol' WalMart Wave!"
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