in one's birthday suit

Meaning: Completely naked.

Language: English

Literally: (Already vivid in English)

Example: “The toddler escaped from the bath and ran through the party in his birthday suit.”

Category: Body & Senses

Origin: The joke is that you wear it on the day you were born. In the 18th century a "birthday suit" was a fine outfit worn to court on the monarch's birthday; the naked sense is recorded by the late 18th century.

Equivalents in other languages

More idioms — Body & Senses

More English idioms

From our proverbs

Browse all proverbs →

← Back to Idioms