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(from Latin) A fun, but more polite and generally, highly acceptable, way of saying brain fart or cerebral flatulence.
David 1: "Oops, sorry, David I MEANT to say I'll hold the fence panel and you hammer the nail in (not screw it in). I think I just had a brain fart."
David 2 (seeming a bit shocked): "A what???"
David 1: "Cerebral flatulence."
David 2: (looking a little confused): "Eh?"
David 1: "A "lapsus mentis"."
David 2: (still looking a little puzzled but just getting it): "Oh!"
by LangFill May 18, 2017
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Jul 13 Word of the Day
a phrase chiefly used in northern England.

it is a contracted form of "it'll be reet", where "reet" means "alright" or "OK".

living your life according to "be reet" is the only way to find happiness in life.
Geoff: "ZOMFG a just hopped off the buz n me 'ouse is burnin' down n me Deirdre's in there dyin!"
Jack: "Be reet."
by Tommmmmmmmmmmmm May 06, 2007
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