birthday suit
The term "birthday suit" humorously refers to the state of being naked, as one is when born.
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Definition
B2Informal
(humorous, idiomatic)The state of being completely naked.
Example
- He jumped into the lake in his birthday suit.
Similar
Terms that have similar or relatively close meanings to "birthday suit":
stark nakedau naturelgo commandoskinny dipfull montystrip searchbunny suitnaked ladystrip downdress suitshow some skinfull dressdress outmonkey suit