1. to act badly or incorrectly; to perform poorly or inappropriately
Usage: transitive or intransitive; formal or literary
2. to play a role in a theatrical production badly or without skill
Usage: transitive or intransitive; theater/performance context

Examples

• The actor misacted the final scene, losing the audience's sympathy.
• She misacted her part so badly that the director asked her to rehearse again.
• He misacted in the meeting by being overly aggressive with the clients.
• The child misacted during the school play, forgetting most of his lines.
• If you misact now, you may damage your professional reputation.
• They misacted their roles as concerned citizens, revealing their true indifference.