When your girl friend/boyfriend is taking a shower and you sneak up on them jump in the shower cover them with the black bag and beat the shit out of them and when their on the floor you jizz/shit/pee on them and then yell surprise.

A pick me is a woman that is willing to do anything for male approval. She will embarrass or throw other women under the bus to achieve this goal. The unfortunate thing about a pick me is usually the men they are trying to seek approval from are of poor quality and treat women badly, leaving little real benefit for the pick me.