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1.
Gatted is the past tense of the verb to gat, which me get shot for example
"Yo T-bone, dat nigga just got his ass gatted" "for real"?
"Chea dawg, dat other nugga just busted 8 caps in his ass"

Daymm!!!!!
by Metcoisha Shinaenae June 07, 2006
 
2.
Just another word for ratarsed or legless. Really, really, really drunk.
Me and Daz went down the social last night, we got absolutely gatted.
by Johnny Bosanova January 01, 2004