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birthday suit
birthday suit
Nakedness, as in The doorbell rang, and here I was in my birthday suit. In 18th-century Britain this term originally referred to the clothes one wore on the king's birthday. Later it was jocularly transferred to bare skin, alluding to the condition of a newborn baby.
birthday suit
Wearing no clothes. People said to be in their birthday suit are as naked as the day they were born.