From Longman Dictionary of Contemporary Englishquick-temperedˌquick-ˈtempered adjective BAD-TEMPEREDsomeone who is quick-tempered becomes angry very easily SYN bad-tempered OPP easy-going
Examples from the Corpus
quick-tempered• At fifteen, Catherine was the most beautiful girl for miles around, but she was proud and quick-tempered.• My father was quick-tempered and often drunk.• They are a wild, free-spirited people, quick-tempered as Elves go, and swift to avenge any stain on their honour.• He was also quick-tempered in a way that sent Frankie scuttling for cover whenever he raised his voice. 