in your birthday suit

US /ɪn jʊər ˈbɜrθ.deɪ suːt/
UK /ɪn jʊər ˈbɜrθ.deɪ suːt/
"in your birthday suit" picture
1.

çıplak, doğum günü kıyafetiyle

naked; without any clothes on

:
He was caught running around the garden in his birthday suit.
Bahçede çıplak koşarken yakalandı.
She felt embarrassed to be seen in her birthday suit.
Çıplak görülmekten utandı.