brain fart

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brain fart

colloquial A momentary mental lapse in attention, memory, understanding, care, or competence. Sorry boss, I just had a little brain fart there. What were you saying again? Jack, having a bit of a brain fart, accidentally sawed the beam completely in two.
See also: brain, fart
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
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