rub one off 

to masturbate quickly until climax. pleasure is not always the primary reason for it.

She left her shoes her? I'm gonna go rub one off in her shoe.

rub one off by crazywhores May 2, 2003

spank one off

v. Masturbate.

He disappeared into the bathroom for 10 minutes, and I knew he'd gone to spank one off.

spank one off by Pecan Pie April 30, 2004

cracking one off 

noun. from English slang terminology. The act of masturbation. v. to masturbate.

"where's jim?"
"probably upstairs cracking one off to some midget porn"

cracking one off by Olly J February 6, 2005

pinching one off 

1. The elimination of fecal waste through one's anus.

2. The art of expelling feces from one's anus in a manner that exceeds the definition of "pooping" or "crapping".

1. I was just in the bathroom pinching one off

2. Oh God how I love shitting!

pinching one off by Purno December 9, 2008

pull one off 

Having a wank

Alright lads, I'm just going to pull one off

pull one off by Lad10 November 3, 2013

tie one off 

To drink to the point of extreme intoxication. Synonymous with tie one on.

Eric: I think I'm going to tie one off tonight.

tie one off by littlebadger June 19, 2009

knock one off 

1. Make love to yourself
2. A bout of self help
3. To masterbate
4. Pull the popes cap off

Dont go to the shop yet sugar, I just need to quickly knock one off.

knock one off by Frank Lard June 6, 2007