Birthday suit
Idioms & PhrasesEASY
naked (informal)
Birthday suit
Idioms & PhrasesEASY
naked (informal)
Learning Progress
Examples
"He jokingly said he was in his birthday suit when he opened the door by mistake."
"The child ran into the garden in his birthday suit, making the neighbours laugh."
Mnemonic Trick
Picture how you were born — without clothes.
Cultural Context
Informal; humorous.
Source: Idioms & PhrasesAdded: 11/13/2025
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