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Abbreviation for "Yeah, good one". Used when someone makes a dumb comment or suggests something irrationally.

Can also be stylized YG-1
A: Yo man go get up on stage with those bitches and pull your dick out!
B: YG1

A: Lyrically, Lil Wayne clearly surpasses the ability of both Biggy and Nas combined!
B: YG1 bro
by BigB-KILLEM April 22, 2012
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