The act of taking a shit on the person while recieving a blowjob.
Comparable to a Blumpkin, but this act involves the poo to go on the person rather than the toilet.
It is a Human blumpkin.... hence, Humpkin
Only people who are disgusting do this lol... It a bit off from a Cleveland Steam Roller
Girl 1: I dont know what to get my bf for his birthday.
Girl 2: Just give him a blumpkin this year.
Girl 1: I did that last year, I need to up it
Girl 2: Give him a humpkin
Girl 1: A what?
Girl 2: Give him a blowjob and instead of him pooing in the toilet he'll poo on you.
Girl 1: That's a great idea!
One who has a uncontrollable desire to hump any time during the day/night.
1. Kate is my favorite little humpkin.
the act of making a pumpkin
Let's hit the skins and humpkin
to cut a small or big circular hole in a pumkin to have sexual intercourse with. For best use leave the pumkin guts in and heat in the microwave.
Once again Todd struck out on Halloween and ended up making sweet love to a humpkin all night long.
A sex session like a grumpkin in which one sits on a toilet taking a shit while another person gives the shitter a blow job; during a humpkin the grumpkin reciever humps the grumpkin givers face while holding the back of her head; hence HUMPkin.
"My you really humped my face while I was giving you a grumpkin Jimmy."
"Ah yes, cynthia, I did not want you to do all the work my dear. That was a humpkin"