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To complete the act of anal sex by removing the penis from the anus immediately prior to ejaculation, resulting in exterior ejaculation up and between the partner's buttocks; to cum up an anal sex partner's ass crack.
I was so damn randy last night. By the time I was ready to flush n fizz Teri's hot ass, my jizz nearly reached to her shoulder blades.

Tammy is a good sport! During our threesome, after I flushed n fizzed Gina, Tammy licked her backside clean. It was hot!!
by Biil Beck O'Hannity March 29, 2010
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