uncomplimentary UK /ˌʌn(ˌ)kɒmplɪˈmɛnt(ə)ɹi/US /ˌʌn(ˌ)kɑmplɪˈmɛnt(ə)ɹi/ adjective1 •Not complimentary; negative or insulting. formsmore uncomplimentary · most uncomplimentary