A psychological term. When a participant is in an experiment you may not get accurate results because they are aware of the experiment and in turn go out of their way to do everything wrong or go against everything u ask them to.
scientist 1 "this guy is doing everything wrong"
scientist 2 "ah a classic case of the screw you effect"
the sexual act of a having a woman spinning while riding a man penis in the fashion of a screw driver screwing in a screw but it can be reverse to have the man spinning while in the woman
lindsay spun around while she was riding me in bed the other night we called it the screw driver
(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!