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noun. 1. the tendency to or the condition of doing or saying completely moronic shit. Esp a temporary condition that plagues the sufferer who typically (we hope) behaves rationally and intellegently, but for whatever reason, cannot think clearly and act sanely at the present time. 2. Condition that causes one to be unable to think of a word or coherant thought that is just at the tip of his or her tongue, either leaving the sufferer hanging or making him/her say something incorrect and stupid instead. synonym: brain fart
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