Top Definition
Something so sexually undesirable, abhorrent or repulsive that it cannot be used for masturbation purposes.

Opposite of fappable.
Guy #1: Did you see "About Schmidt"?
Guy #2: Jack Nicholson and Kathy Bates? Jacuzzi? That shit was unfappable.
#bonerkiller #saltpeter #do not want #instaboner #fappable
by Wrebagzhoe September 23, 2009
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