Overpowering somebody in the lower basketball post.

another form of the word cool; to approve of

(n.) A hipster-poser. Someone who claims to be a hipster, but doesn't fully commit to the conventions associated with it. i.e. liking music before it was popular, rejecting social norms, drinking coffee from Starbucks, etc.

I.e. cool, mega cool, excellent

When a basketball player is killing the game in the paint with his post skills.

A zefron poster makes a boss horcrux in AVPM. It is also one Harry Potter, Ron Weasly, Dumbledore and one Draco Malfoy's favorite chistmatic humanitaian. It is deeply rivaled by umbridges talor launtner poster.

Poster commonly designed for use in schools and offices that generally consist of a photograph centered in a rectangular frame with black background, a title in large text and a description in smaller text.
This kind of poster has been repeatedly parodied and it's a common meme along imageboards.