Related Clues:

• Hit the roof
• Spout
• Speak wildly
• Pontificate
• Companion of 14-Across
• Do some tub-thumping
• Rave's partner
• Let off steam
• Lose one's cool
• Blow one's stack
• Babble on
• Spout off
• Earful at the complaint department
• Burst open
• Bluster