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1.
Prison file containing all information on a prisoner or also can mean their reputation. Prisoners can put false jackets on other prisoners to discredit them.
"He's a child molester, it's in his jacket"
by x July 23, 2003
 
2.
someone who raises some one else child as his own with or without knowing
ian beale or any other sap
does he know that kid aint his why is he being a jacket
by nezzman January 13, 2008
 
3.
1. Bodyguard
2. Bad ass
Two "jackets" come pimpin' outta the club, followed by their boss: six-foot, two inches and 170 pounds of pure, unadulterated pussy from heaven. I knew then I was in love. . . .
by William Dean A. Garner September 10, 2003
 
4.
a light coat worn in spring or fall
what your idea of a perfect date?
april 23 its not to hot and its not to cold its perfect for a light jacket
~miss congeniality
by loop February 26, 2005
 
5.
A child raised by a man in the belief that he/she is his own child but is actually not his biologically.
Tom spent so much money on that dress for the father/daughter ball he's taking Susie to. If only he knew that her real dad was actually Jack. It's always sad to see a guy raising a jacket.
by lostjoker0 February 24, 2009
 
6.
A slang term for police (pigs).
I'm tired of these motherfucking jackets.

by Jim January 09, 2003
 
7.
Having a wank. (Usually occurs around 10 times a day.)
Do not disturb, Jacket is having a jacket.
by jacketer October 27, 2008