Any form of receptacle (typically an orphaned gym sock) that is used during masturbation to capture one's ejaculation.
by white_castle March 06, 2011
A over sized jacket worn to conceal the crotch area used to cover up public masterbation
Dude I was bored in school today so I just jerked off in class cause I wore my fapjacket.
by fistpirate12 December 17, 2011