Top Definition
Used commonly in reference to girls who follow around and worship any guy who dons an infamous green uniform, in the hope they might receive the genetic material of such a fine male specimen. Notable groups followed by green tac include the Dallas Stars, Oregon Ducks, NY Jets (although they suck) Green Bay Packers, Boston Celtics, New College Dinosaurs.
1: I was busy trying to queue for some lunch but I just got swamped by all these girls
2: They're just greentac!
by jrd3190 December 18, 2012

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