a guy has two. so do girls. it doesn't hurt when you twist, bite, or pierce them. some are longer than others. guys freak out when you tell them "can i play with your wienis" and a girl gets confused. try it sometime...i dare you...
A compressed version of the phrase "wait to finish" in an effort to save times, and allow for one to simply exclaim "I can't winnish!". A form of gibberish, and often a byproduct of impatience and fast speaking when college teens write papers last minute.