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Refers to the small pieces of semen that miss their mark and land somewhere close by. Derived from the words 'fap' and 'shrapnel'.
When i blew my load on Judy's tits, some fapnel got on her face!
by -D=S- November 04, 2009
Fap Shrapnel, i.e. cum.
I got fapnel in my eye
by Kamp13 December 17, 2010