spank the monkey
To masturbate by stimulating one's penis.
ADJ.
hard, quick, threatened
The teacher threatened to spank the misbehaving student if he didn't settle down immediately.
VERB + SPANK
don't, going
I'm going to spank you if you don't stop misbehaving right now.
SPANK + NOUN
ass, mistress, molly, suitcase
The naughty child got spanked on the ass for running into the street.
ADV.
again, such
The father spanked his son again for running into the street without looking.