Top Definition
Becoming such an extreme environmentalist that you generally creep everybody out because all you talk about is the strange projects that you're into, while managing to be incredibly condescending at the same time.

Named for actor Ed Begley Jr.
Did you hear about Andrew? Yeah, he went full begley. Now he spends all his time making weird things to water his lawn with his own pee, and it's all he talks about. I can't stand to see him like it.
by huntdoggy February 21, 2011

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