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2.
The feeling you get when moving somewhere very warm or hot after being outside on a very cold day.
Ex 1: Phil: "Dude I love heatgasms they feel so good."
Ex 2: "Oh man last night when I came in from shoveling I had a heatgasm, it was great."
by mr.mmbossypants29 December 28, 2011
 
1.
What you experience when you've got a poison ivy rash and you take a hot shower
Omg, my mind was about to explode after that heatgasm I had in the shower
by shuman407 September 01, 2008
 
3.
When someone becomes so overwhelmed by warmness that they reach the brink of an orgasm.
Zak gets into Laurens car

Zak: Wow Lauren it's so warm in here.

Lauren: I know. I'm having a heatgasm
by guy1234000 February 04, 2011