Top Definition
When a person, guy or girl, goes to the bathroom to take a shit right after a guy has just pissed, leaving the toilet seat up, and the second person forgets to put the seat down and their ass hits the water.
Kasey - Dammit, Blake! You forgot to put the toilet seat back down! Now my ass is all wet!
Blake - Oh, I also forgot to flush....

Blake was then murdered for Half-Bathtize ing Kasey.
by squintyekalb July 13, 2013

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