Top Definition
Based on the common acronym (TGIF - Thank God It's Friday) this terminology has come to be popular in relaying excitement related to attendance of Underworld Fridays - a highly popular Electronic Music event, held every Friday in Houston. The event is held at a club called Kryptonite (709 Franklin St) in downtown and features Dubstep, Electro, and all types of cutting-edge electronic music.

TGIUF - Thank God It's Underworld Friday.
I've had such a stressful week, TGIUF! I can't wait to party tonight.
by Madam_Underworld June 14, 2012

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