Top Definition
Similar to facebook activism, the belief that no-commitment activities will result in meaningful social change. This meme results from the belief that awareness is all that is necessary to improve society, rather than actually donating money or time.
Real examples of avatar activism:

I changed my Twitter avatar to green to support Iranis!

I blacked out my avatar to support awareness of Australia's Black Saturday!
by Moggraider June 25, 2009

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