The term 'Be a Brat' can be broken down into five crossword solutions: IMP (3 letters), SASS (4 letters), TERROR (6 letters), COAL (4 letters), and ACTUP (5 letters). IMP stands for 'IMPUDENT, ' which means to be rude or disrespectful. SASS is an acronym for 'Sarcastic Attitude and Smart-Mouth Syndrome, ' which is a slang term for someone who speaks in a sarcastic or disrespectful manner. TERROR is short for 'TERRORIZE, ' which means to cause fear or TERROR in someone. COAL stands for 'Coercive Obedience and Aggressive Leadership, ' which is a phrase used to describe someone who uses aggressive tactics to get their way. Finally, ACTUP is an acronym for 'Act Up, ' which is a phrase used to describe someone who is behaving badly or misbehaving.