An infliction of tall guitar players who stoop to play. forming a hump back also known as guitar back.
girl 1: Seb so has a humpback
Girl 2: nah thats guitar back
Girls 3: oi humppy
by Emmy "mop" Sharples October 18, 2006
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When somebody does something unforgivable and irredeemable.
"Goddammit! You slept with my sister, man! Kurtzman, give me my guitar back!"
by JormanThoad September 11, 2018
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