What is Hump Up?
1.
The act of shitting where the back is fully arched forward in the manner of a dog.
V. I just humped up all over the floor.
Don't go in there he's humping up!
She' going to hump up all over his chest.
N. Did you smell that hump up? It was awful.
I just stepped in hump up.
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1.
Very similar to a "donkey punch" except when you are about to ejaculate you pull out of the womans anus and punch her in the k..