Related Clues:

• Cut loose
• Deliver a tirade
• Go wild
• Hit the roof
• Unleash
• Not hold back
• Act unrestrainedly
• Act without restraint
• Swear a blue streak
• Show anger, maybe
• Pull out all the stops
• Do unrestrainedly
• Forgo restraint
• Do without restraint
• Speak without restraint (with "it")