Who the screw

(Slang): A censored, rhyming way of essentially asking "who the fuck", also can be done as "what the screw", "Where the screw, ect, but doesn't sound nearly as good.

Child 1: *Throws pencil at Child 2*
Child 2: Who the f-....
Teacher: *ahem*
Child 2: Sorry. Who the screw thew that?!
Child 3: *points at Child 1* it was him!
Child 1: Snitch!