my baby got back

Elated! Surfer dude who took his surfboard for ding repair and got it back in his possession.

Melvin walks in the house with his recently repaired surfboard, "my baby got back!"

jack off

Beat your meat, whack off, give it a good wank, rub one out, give it a good rogering.
Also, to fuck around in a playful fashion. And or serious.

Jed never listens in class, he's such a jack off.

Roger was feeling spring had sprung and on a whim he ended up jacking off,
Hey Jack off are you looking for trouble?