Related Clues:

• Crack up
• Blow a fuse, so to speak
• Emulate Etna
• Eject, as oratorical venom
• Emit expletives
• Deliver, as venom
• Make like a geyser
• Flare up
• Let out lava
• Emulate Vesuvius
• Disgorge, as lava
• Show one's rage
• Make like Mount St. Helens
• Act like a volcano
• Give vent to anger