Top Definition
1. going on a spree of looking for images
2. going insane after having screwed around with databases, for long periods of time, in the attempts to make maps on Geographic Information Systems (GIS)
"He's going gis crazy, must recently joined fark.com"
"She's gone gis crazy working in the Magellan Lab 22 hours straight"
by Jon C March 16, 2005

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