bell-bottoms

US /ˈbelˌbɑː.t̬əmz/
UK /ˈbelˌbɑː.t̬əmz/
"bell-bottoms" picture
1.

trousers that are wide below the knee

:
She wore a pair of vintage bell-bottoms to the disco party.
Bell-bottoms were a popular fashion trend in the 1970s.