means naked, nude
Background from Atlanta, USA
'I won't stop until I get them in their birthday suits'(Ludacris)
by Senasu March 24, 2005
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A suit that looks like you're naked, and look like you were a baby.
You just captured me wearing a birthday suit!
by TheUserwithnoname2 June 18, 2013
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some trashy outfit you wear on your birthday or any other day of the year usually consists of a pair of panties and nothing else
Guy1: Hey man I saw Lisa in her birthdaysuit yesterday

Guy2: Really? What'd she look like?
by childplz January 07, 2011
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A legal proceeding that you file against a stripper, seeking monetary compensation for the disappointment you suffered when he/she didn't "bare it all" for your once-a-year special occasion.
Exotic dancers should always take out indemnity-insurance against birthday suits.
by QuacksO June 09, 2018
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