Can mean one of two things:
1) To stroke a penis, either by masturbation or by doing it for someone else
2) To kill someone in Maphia lingo
1) To stroke a penis, either by masturbation or by doing it for someone else
2) To kill someone in Maphia lingo
For definition 1: "I'm whacking off right now.", "Your sister whacked me off last night."
For definition 2: "If I find out Lenny's wearing a wire, you're gonna whack him off.", "I'm going to whack you off if you don't whack off Lenny."
For definition 2: "If I find out Lenny's wearing a wire, you're gonna whack him off.", "I'm going to whack you off if you don't whack off Lenny."
by deepspace10 November 21, 2011
Get the whack offmug. Does the jet lag still have your body clock all whacked off?
He's dating his step-sister? That's one whacked off family.
He's dating his step-sister? That's one whacked off family.
by Donkalo August 19, 2008
Get the whacked offmug. 
Get the whack offmug. "The car hit him and I heard this whack-off BANG"
"She has whack-off breasts." (This can also link to "whack off" meaning "to masturbate")
"She has whack-off breasts." (This can also link to "whack off" meaning "to masturbate")
by Gabez November 29, 2009
Get the whack-offmug. Also known as W.O.W., this is Entensity.net's service to all us wankers out there. Every Wednesday, they reward their loyal viewers with a full length porn clip!
Hey, it's Wednesday! I'm gonna go see what's on Whack-Off Wednesday today! And maybe I'll whack-off!
by PMastaChris May 1, 2008
Get the Whack-Off Wednesdaymug. When more than one males (excluding females) compete in games concerning the ejaculation of semen. No female spectators are allowed at these events.
David Marcus was disqualified from the wack-off olympics for using performance enhancing drugs. However, he got gold in the smallest penis event.
by David Marcus October 27, 2004
Get the whack-off olympicsmug. by USAF Cadet November 12, 2020
Get the Whack-Off Wednesdaymug.