Top Definition
Someone obsessed with female-fronted rock bands, usually male.

Often abbreviated to "GBG," a girl-band geek is someone who prefers bands led by women over bands led by men, often to the point of critically accepting or rejecting bands solely based on the gender of their members, rather than on their talents or productions.
Terry's such a GBG that the only time he listened to Black Flag is when Kira Rosselaer played with them...
by SG Fan October 31, 2004

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