A secret group, consisting of lesbian or bisexual models. The term was coined in honor of the late Gia Carangi, a lesbian supermodel in the '80s.
Model 1: "Hey, do you think she's one of Gia's Girls?"
Model 2: "Yeah, I heard she's dating Katie, but she's also Antony's beard."
Model 1: "Dayum."
by Gichanel January 19, 2010

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