From Longman Dictionary of Contemporary Englishkick asskick assAmerican English informal not polite used to say that someone or something is very good or impressiveTucson pop band Shoebomb kick some serious ass. → kickkick-assˈkick-ass adjective American English informal VIOLENTstrong, powerful, and sometimes violent a kick-ass attitude
Examples from the Corpus
kick-ass• a kick-ass sports car 