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A Hump Blaster is defined as when one person has diarrhea, they place a small hole into their partner's scalp, then release their bowels blasting it into the hole created with a high pressure stream of shit. This forces the skin of the scalp to raise creating the appearance of a large hump that will draw attention.
Dude 1 : Whats wrong with your head?

Dude 2: The boss gave me a Houston Hump Blaster this morning.
by ButButButButIknow January 17, 2019
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