(n) Anything that is discernably not beer. Derived from the Beer/Not-Beer dichotomy, which dictates that anything and everything in existence (and non-existence) can be placed in one of the two aforementioned categories.
Note: Recently, "Not-Beer" has been colloquialized (adj), meaning: stupid, lame, unworthy of praise, worthy of scorn, etc. Due to the recent colloquialization of "Not-Beer," its positive form, "Beer," has only naturally been adopted as an antonym (adj), meaning: cool, awesome, unworthy of derision, worthy of commendation, etc.
Leinenkugel's Honey Weiss: Beer.
Spaten Optimator: Beer.
Smirnoff Ice: Not-Beer.
Stone Brewing Sublimely Self-Righteous Ale: Beer.
A Fresh Keg of Bell's Two-Hearted Ale: Beer.
Billy's new tat of a biker-demon wielding swords of blue flame: Beer.
Freddy's new tat of his grandmother's big toe: Not-Beer.
Freddy attempting to kegstand that Bell's Two-Hearted Ale and failing miserably: Not-Beer.
Getting Along: Beer.