When a male tricks onlookers into thinking that his hands are in his jacket together (interlocking the ends of both sleeve holes) while simultaneously using one arm to jack it hard.
Female Onlooker : OMG, look at Lyle, he is so Jacketing off right now in the corner.

Male Onlooker: No I don't think so, he's just really cold and has both his sleeves connecting to keep in the warmth.
by Chocodiles March 30, 2012
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With a jacket covering up your cock, masturbating so no one can see you do it.

Or with a jacket covering it up, having your girlfriend give you a hand job
Throwing the jacket off - Jordan needed to bust a nut, but there were too many people in the room so he covered himself up and threw the jacket off.

Rita wanting to please her man in public so she laid a jacket across his lap and threw his jacket off.
by CheesesCakesAreDelicous November 9, 2008
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Chat room code for a booty call between coworkers. A common phrase in the midwest United States.
BJ, I'll meet you at the office to drop the jacket off.
by scooterlover May 16, 2014
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