1 definition by Iforgot911

Jumping Jackoff

The act of masturbation during jumping jacks, usually performed by alternating hands each jump.

Guy 1: Why didn't you go to the gym yesterday? You're going to get fat.
Guy 2: No I'm not, I stayed at home and did jumping jackoffs. I was so tired afterward.

by Iforgot911 January 11, 2009