A phrase commonly used by hipsters to indicate that they want to lean against (or 'post up') against a wall, preferably brick, to smoke a cigarette or drink a can of Pabst Blue Ribbon. Hipsters are led to believe that this is the cool thing to do. If there's no cigarette in hand, some hipsters replace the void with a can of PBR, the well known hipster beer. If they have nothing in hand, they fail at properly being a hipster. Generally, if caught in this scene, the hipsters would lift one leg up and rest the sole of their shoe against the side of the wall, completing their "cool" appearance. When suggested to 'post up,' a fellow hipster knows exactly what he/she is talking about and will usually agree to. It's the hipster thing to do.
Victor: Hey man, let's post up.
RJ: Alright man, let me grab my cigarettes.
Allen: Guys, I quit smoking.
Victor: Don't worry about it man, you can still post up with this can of PBR.
by buhfly March 8, 2010
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While in the gym about to squat, bench, or deadlift you get your gear set next to the rack making sure that no one else takes it and that the person doing bicep curls realizes its time to get out.
I walked into the gym to post up at the squat rack; the d-bag doing curls realized it was time to jet.
by Skulletbuster June 14, 2011
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When you casually fuck your girl in a high school bathroom
Did you hear about that guy posting up his girlfriend in D wing?
by anon1288601 January 7, 2015
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To post up is to lean against a wall, table, refrigerator, countertop, and in some extreme cases holding on to the ceiling, or any other convenient surface so that you do not fall down after consuming massive amounts of alcohol. Not only does this allow for a misconception of exactly how drunk you are, but it also makes a viable applicant for the next game of beer pong.
Dude 1: "There ya go Verser, post up. Don't let em' know how drunk you are."
Dude 2: "Is Verser posted up on the ceiling? Jesus H. Christ he has got swag!"
Dude 3: "I got Verser next beer pong game!"
by Mr.Party April 13, 2010
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1.Someone or something that is too prevalent.

2.Being stoked on an enviroment, and willing to stay there for an extended period of time.
by Stewart J. Ferguson March 15, 2011
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hood definition:The act of being prepared,ready and inticipating beef...Ready to retaliate.
#1SEED:Ay Bruh lets "post up" on'em...
#FTPIERCE:You already know, I been posted in the paint...
by #1SEED772 September 9, 2022
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