The notion of Bumblasting is dipping your ass on to someone's face as a show of mockery or irritance.

The perception is in relation to "Tea Bagging" where as instead your aim is for your bottom (or a character in a video game) to connect to a body's face whether up or down from the floor.
Huzzah ha ha, reek the wrath of my "Bumblasting" you noob spawn killer.

I had to "Bumblast" my mate's face who slept over yesterday due to his ever increased snoring.

by SquirrelPower September 14, 2008
Top Definition
When you squat in the shower and sprayy our butt hole for fun.
Hey Matt I just had a bum-blast
by Tin car May 14, 2015
anal penetration
His boyfriend enjoys a good bum blast with extra lubricant.
by BR2112 May 20, 2009

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