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This is when a person needs to shit so they completely remove their pants and underwear. Then they shove a water hose into their butthole and turn it on to fill their rectum with as much water as possible. They finally bend and push out the water shooting the shit like a mini missile. This is used for self enjoyment, onto a victim (prank), or as a sexual act.
1. I felt a mean turd pushing through so I ran to the water hose and did a Brownie Blast.

2. Last weekend was great. I can't believe you Brownie Blasted Chang while he was sleeping!

3. My wife keeps getting kinkier and kinkier. Last night she wanted me to brownie blast her face.
by Cockadylious September 25, 2014
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