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1.
A day in which somebody spends the whole day not bothering to do anytihng, because they CBA (Can't Be Arsed). Usually CBA days are a result of little sleep or a night of drinking.
Guy 1 - 'Hey Guy 2 are you going to do any revision today for our maths test tomorrow?'

Guy 2 - 'Nah im really tired and have been revising for a week, I'm gunna have a CBA day today'
by sheldonlt April 12, 2009

Words related to CBA Day

bored cba day hangover tired