Top definition
A user of new software or equipment, who must deal with the bugs that were not eliminated in beta testing.

(Derivation: Gamma is the next Greek letter after alpha and beta.)
I'm going to wait a while before getting Windows Vista; I remember the problems people had with XP and Service Pack 2 when they came out, and I don't want to be a gamma tester.
by Aaron of Minneapolis January 28, 2007
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