Related Clues:

• Make a face, say
• Excrete
• Emit lava, for instance
• Emulate Etna
• Flinch, e.g.
• Flinch, perhaps
• Eject, as oratorical venom
• Show surprise, perhaps
• Emit expletives
• Deliver, as venom
• Flinch or blink, say
• Make like a geyser
• Disgorge, as lava
• Smile, e.g.
• Block a punch, e.g.