un ‧ cool /ˌʌnˈkuːl◂/ BrE AmE adjective informal
not fashionable or acceptable – used especially by young people:
Have you seen his shorts? They are just so uncool!
It was uncool to get on well with teachers.
un ‧ cool /ˌʌnˈkuːl◂/ BrE AmE adjective informal
not fashionable or acceptable – used especially by young people:
Have you seen his shorts? They are just so uncool!
It was uncool to get on well with teachers.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012