An individual who is over aggressive about masturbating, often putting aside friendship to stroke his banana
That guy has no friends because he is a faptor!
by Papa Grande November 10, 2013

A prison term for a Sexual Offender; i.e. child molester, sexual predator, etc. term comes from the initials S.O. which stand for Sexual Offender. An "S" as written looks like a "5" and a "O" looks like a "0" (zero) thus the term fifty, fitty, fitty cent, fifty cent.
by papa grande October 17, 2006
