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Total GDI Move. When a geed does something nerdy, strange, or generally uncool or not fratty.
Chris: Dude, did you see what happened last night?
Dude: No, what?
Chris: Billy got so drunk at the bar he tried picking up a chick by asking if she preferred Kirk or Picard.
Dude: The hell? TGDIM.
by Matt..... September 10, 2011
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