birthday suit

== English == === Alternative forms === birthday-suit === Etymology === From the lack of clothes worn when one is born. === Pronunciation === === Noun === birthday suit (plural birthday suits) (idiomatic, often humorous) Nakedness, unclothed skin; an exposure of a human's natural anatomy without clothing. Used other than figuratively or idiomatically: see birthday,‎ suit. ==== Usage notes ==== Usually used in the phrase in one’s birthday suit, but sometimes seen alone; for example, as in Guess what she was wearing? Her birthday suit! ==== Derived terms ==== ==== Translations ==== === See also ===