1. Verb: To fuck with the mind/head, to toy with ones thoughts of reality; to cause a state of confusion and befuddlement.
2. Noun: A brainfuck -- something that brainfucks.
3. Adj.: An object that possesses qualities or traits that brainfuck.
1. Man, Hideaki Anno brainfucked me this time!
2. That brainfuck of an anime will have me contemplaiting its meaning in my dark, dark room for days...
3. That Evangelion movie sure was a brainfucker, eh Wang