adj. phr. , informal Confused in mind; puzzled. Bob was all mixed up after the accident.
Compare: BALL UP 1 . 2. Disordered; disarranged; not neat. The papers on his desk were mixed up. 3. informal Joined or connected (with someone or something bad). Harry was mixed up in a fight after the game. Mary's father told her not to get mixed up with the students that always break school rules.