Jack it and slack it
Smacking your wiener like it owes you money and then laying there like a lazy sack of dirt.
I jack it like it's my full-time job and then slack it like I just won the lottery.
He jacked it so hard he got a bruise and then slacked it like he was born in a hammock.
Jack it until your face turns red and then slack it like you're the king of the couch.