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3.
To discreetly sneak away with the hopes of going unnoticed.
Darren was supposed to be manning the fire station emergency phones all night, but around 7 he decided to steal off for an hour or so to catch the 2-for-1 happy hour lapdance special at the Boom-Boom Room.
by Nicholas D November 23, 2007
 
1.
to punch or hit someone as a result of the person upsetting you
He's so annoying! I'm about to steal off on him!
by Dan August 19, 2003
 
2.
To give the first punch. Where the person did not expect it, or where they did expect it but it was to fast for them to react.

to suprise someone with a blow to the face.

to steal the first blow in a fight hence steal off, since normally people "square up" in a fight so you punch them before they square up.
He was talking to my girl so i had to steal off on him.
by icecreamman33 May 30, 2009
 
4.
steal off means 2 go crazie
boy says: ur names mary rite girl says: no ma name is fuckin jane wdf is wrong wit chu

boy says: aye srry u don't hav 2 steal off nd shit
by sha sha bby August 30, 2009