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1.
a. Usually refers to a person who is acting contemptibly naive or arrogant, aka a jerk

Derived from banana, slang for the male genital. Essentially a more modern usage of dickhead or prick, but as a derogatory adjective.
Pronounced buh.nAEn

Girl 1: Tim's been banane shit lately. He saw me at the mall yesterday when he was hanging out with his friends, but looked away as if he doesn't even know me.
Girl 2: Hmmm.. He's still cute as ever though.
Girl 1: Go to hell!!
by Masci April 14, 2008
 
2.
Pronounced: bahh | nahh | nehhhhh

Noun: Banane, Someone acting negligently and/or performing under par in life.

b. Usually refers to a person who is acting contemptibly naive or arrogant, aka a jerk Derived from banana, slang for the male genital. Essentially a more modern usage of dickhead or prick, but as a derogatory adjective.
Example:1) calling a fivefold raise in poker with 2, 7 unsuited and loosing. In the event that said banane wins this hand by pure |Dreck| this person is reffered to as

|scheiss banane |

Example:2) you failed at "Slow Ride" on easy mode in Guitar Hero 3? You BANANE!!!
by Zeroe November 11, 2009
 
3.
A expression used to note that you realized that programming is as important for yourself as air and water is.
A: "Hey whats up"
B: "Banane"
A: "Good thing you finally are learning Ruby!"
by IsThisForReal September 25, 2014