monkey shoulder

The slouch one gets after excessive masturbation.

Steve tried to hide the fact he was touching himself in the Wendy's bathroom, but came out with a serious case of monkey shoulder.

by MacDaddy6.9 November 12, 2017

shoulder monkey

The invisible monkeys that live on either of one's shoulders.

Tell your shoulder monkey to stop throwing feces at me!

by beepers872 January 7, 2008