Related Clues:

• Cry too readily, maybe
• Act poorly
• Flinch or blink, say
• Speak histrionically
• Play a role none too subtly
• Be over the top, while acting
• Act big?
• Act unprofessionally?
• Get overtheatrical
• Go over the top on Broadway
• Act the drama queen
• Act unprofessionally
• Mug, e.g.
• Get all histrionic
• Smile, e.g.