Birthday Suit

The slang term “birthday suit” refers to being naked or without any clothes on.

In a more detailed description, the term “birthday suit” humorously refers to the state of being unclothed, as if one is wearing only their skin on their birthday. It is often used in a lighthearted or humorous manner to imply nudity and can be considered a playful euphemism for being naked.

Examples:
1. “I was so tired after a long day that I just collapsed into bed and fell asleep in my birthday suit.”
2. “He decided to shock his friends by jumping into the freezing cold lake in his birthday suit.”