Top Definition
1. a flaccid testicle that hangs out of the wearer's shorts; 2. a deruagatory term for an unwelcome party guest that becomes the last person at the party.
1. I hate these shorts, my scrotflaps are always hanging out. ; 2. Zack is such a scrotflap sometimes, I wish he would just get the point that we don't want him hangin out for 58 hours in a row.
by Mike D to the Nizzle May 18, 2005

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