When a woman's vaginal entry and exit doors smell like the fishmongers on a busy Monday morning.
Hey bro, I can't believe I went down on her smelly flaps. Bitch be humming!
by zimbo23 November 2, 2013
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A competition to see who can flap out the grossest fanny smell
She's the regional champion at smelly fanny flapping, what a whiff worth a sniff
by mitch00uk March 21, 2015
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Foul smelling odour emanating from the vulva majoris.
Damn! That girl has Smelly Flaps Syndrome (SFS) . I can smell it a mile away.
by UWOTM8? October 15, 2017
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