Top Definition
While receiving a blow job on a bed, couch, or the floor...the act of taking a knee to the testicles right before ejacultion.

A failed blow job.

Worst feeling imaginable.
"So my girlfriend was giving me head, and as I'm about to cum she adjusts herself on the bed, and accidentally kneed me in my balls...terrible blowie fail"

"All of my girlfriends friends were laughing at me because she told them about the blowie fail".
by Olde English September 30, 2009
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