A peeve is something that really annoys you, like waiting in a long line or dropping a can on your toe because someone left it on the counter. Again. It's also a word for describing your resulting mood: peeved.
You probably know the term "pet peeve," which is something that may not bother everyone, but particularly irritates you. Your pet peeve might be misspelled words on signs, mismatched socks, or close talkers. Peeve is also a verb, meaning "irritate." The adjective peevish, for “silly, perverse” came first, in the fourteenth century.