look up any word, like blumpkin:
Something extremely large or noisy.
"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")
by Gabez November 29, 2009
to mastrubate, jack off
Dude, I am going to whack off in the corner
by Travis December 08, 2002
my favorite pasttime, next to sleeping
i like to whack off several times a day, it feels so good
by Yakov the Jack off September 29, 2003
The gift that keeps on giving!
Making love to yourself.
If I whack off with both hands, that's a perfect ten.
by England phi beta gamma April 04, 2008
To perform an act of masturbation.
Someone that is being a dick.
1. Why don't you go whackoff for a while.
2. You're being a whackoff.
3. That guys a whackoff.

I'm joining these two words to make one better word.
by Keith Wolff October 29, 2004
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
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."
by sweet96635 November 21, 2011
to have sex with Pamela Handerson
I fucked her good last night, Pamela Handerson that is.
by Guy Mann December 28, 2003