1. To act quickly without much forethought.

2. To perform a task using as little effort as possible
Person 1: "Did you finish your report?"

Person 2: "Yeah, but I one off'd it. It's a C at best."
by Gamurman November 13, 2011
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Chiefly British.

-adjective
1. one of a kind; unique.
2. done, made, or happening only once.
-noun
3. a one night stand.
4. something done, made, or happening only once.

This began as a British expression but is now known in the US and elsewhere.
Eddie: Say what?! You base-jumped off the Empire State Building? Were you insane?!

Johnny: Hey, it was only a one-off. I was a turk lad at the time and a little drunk, and I don't think I'd ever have the courage to do it again.
by Raven Grace October 23, 2007
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The one-off neon in Jinsoku is so tight, I wonder where he got the idea for that widebody!
by scottyonapotty February 3, 2005
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When an fat dumpy lesbian beats herself off and since she's so fat she aggressively rubs her knuckles on her puss to get off
Patti couldn't get the job done with her dildo so she ended up knuckling one off on that big fat pussy
by Bigdickballer420 July 24, 2017
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1. To quickly squeeze out a shit
2. To pinch off the end of a rather large shit in order to be done quicker.
Jerry had to pinch one off as the game started in ten minutes.
by Anonymous April 12, 2003
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to masturbate;

the circular motion (like a piston) of one who is furiously beating his meat.
sometimes, when I see your mom, I go home and spin one off
by droolbomber August 20, 2010
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