birthday suit

noun
1.
bare skin; nakedness:
They were sunbathing in their birthday suits.
Origin
1745-55
British Dictionary definitions for birthday suit

birthday suit

noun
1.
(informal, jocular) a state of total nakedness, as at birth
Word Origin and History for birthday suit
n.

first attested 1730s, but probably much older. The notion is the suit of clothes one was born in, i.e., no clothes at all. Cf. Middle English mother naked "naked as the day one was born;" Middle Dutch moeder naect, German mutternackt.

birthday suit in Culture

birthday suit definition


To be “in one's birthday suit” is to be completely naked (as people are at birth).

Slang definitions & phrases for birthday suit

birthday suit

noun phrase

What one is wearing when completely nude; the state of nakedness: Naked as a jaybird, with nothing on over his birthday suit (1730s+)


Idioms and Phrases with 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.