1 definition by Amber at WM

Top Definition
A subtle influence on a highly self-regarding and insular discussion group that deludes them into agreeing to dubious assumptions and plans on the basis that everyone else seemed to think it was a good idea... or at least no one wanted to be the one to speak up in dissent.

It mentally shortcuts past the process of examining risks and alternatives, assuming that of course the others have taken them into due consideration.
The Bay of Pigs invasion is often cited as a disasterous example of group think; how could the "best and the brightest" engineered such a fiasco?
by Amber at WM December 01, 2005

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