locker room

US /ˈlɑː.kɚ ˌruːm/
UK /ˈlɑː.kɚ ˌruːm/
"locker room" picture
1.

a room in a sports facility, school, or workplace where people can change clothes and store their belongings in lockers

:
The football team gathered in the locker room before the game.
Please leave your valuables in the locker room.
2.

an environment or atmosphere, especially in sports, characterized by informal, often crude or competitive, male-dominated conversation and behavior

:
His comments had a distinct locker room feel to them.
The company culture sometimes felt like a locker room, with competitive banter and jokes.