when going over a hill at high speeds and that euphoria feeling overcomes you; you let back your head and sigh going over a hill. Can also be used as an adjective: Hillgasmic
Billy: Dude did we just go over a hill?
Bob: Yea why?
Billy: Cause I just totally just had a Hillgasam
Bob: Yea why?
Billy: Cause I just totally just had a Hillgasam
by Zack Wiggins February 12, 2009
Get the Hillgasam mug.When a girl has a orgasm and punches you in the face.
Or when a girl has a orgasam and beats the shit out of you.
Or when a girl has a orgasam and beats the shit out of you.
Russia : Skinny Pete what happened to u?
Skinny Pete: the girl I was with had a hulkgasam.
Russia: damn.
Skinny Pete: the girl I was with had a hulkgasam.
Russia: damn.
by Liberty Princess February 28, 2016
Get the hulkgasam mug.When you're having an orgasm, and it feels so overwhelming. Your body feels like it's on fire and hot as HELL.
Oli: Oh damn, last night I was giving Evalynn a hellgasm so bad last night, she fuckin' woke the neighbors up with her screaming!
by bmth_is_love March 1, 2009
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