Top Definition
n.
Explosive diarrhea. When you can no longer hold it in and when released, comes out in an explosive manner. See also assplosion
After eating all that Mexican food, I developed a bad case of butt blow. Man, I needed a whole box of matches to clear up the stench from that one!
by wesleywillis October 18, 2007
When someone farts on a penis during anal sex
That butt blow felt great
by lgmjr93 October 20, 2011
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