A high school or college athlete - often times a football, lacrosse, or baseball player - who won't go out in public without sporting his team gear. Jacketeers are either rocking their team-issued sweats, warm ups, or team jacket (hense the word "jacketeer") everywhere they go. Why?

Because Jacketeers are obsessed with getting casual observers (especially lacrosstitutes and cheerleaders) to realise they're on the team, mostly because they're searching for some type of recognition they don't get on the field, since they're always bench warmers.

The Jacketeer is the douche who's always saying at parties "Yo, what time's practice tomorrow?" whenever there are girls around. This is a pathetic attempt to make sure every vaj on campus knows he's on the team. He has no idea his teammates think he's a joke.
Dude #1: How much you guys wanna bet that freshman wears his team sweats to the party tonight? Worst Jacketeer in history.

Dude #2: I'll be surprised if he does't show up in Under Armour tight gear w/ his name and number on the back.

Dude #1: I bet he fucks w/ his elbow pads on.

Dude# #2: You know he's gonna get a tattoo w/ two lax sticks in the formation of an "X" on his calf, w/ his number and team logo, right?

Dude #2: Please tell me you're joking. Thats it. We're gonna hafta keep putting this dude through initiate til he quits. What a tool shed.
by Rye Pie February 1, 2008
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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 24, 2003
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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
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"He robbed a bank! It's in his jacket!"
"He must be an alcoholic because a DUI is in his jacket."

"She's a thief! Don't trust her! Shoplifting is in her jacket!"
by jwinter August 4, 2017
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"I'm tired of tha motherfuckin' jacket sweatin' my gang while I'm chillin' in the shack." -Eazy E (N.W.A. - "Fuck Tha Police")
by Nick D February 1, 2004
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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
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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 11, 2003
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