Taking a dump while sleeping.
#1: Bro, you were in the can for 2 hours, are you alright?
#2: I was slumping, ya prick.
When a young male lowers his standards for casual sexual encounters. "Slut humping."
"I feel like there are no interesting girls here.... I think I'm going to end up slumping again for my birthday."
One Human Humping Another while Asleep...
Sleep + Humping.... often done when both partners have PJs on.
One Night after a Long day at Work Bob Briefly Slumped Jane.... the Slumping was not of a duration that Jane found Acceptable.
Jane was left unfullflled.
Having sex or romping in a sleeping bag.
Me and jon saw two people slumping while we were walking around the campsite.