Related Clues:

• Close to erupting
• Spitting mad
• Really ticked
• Out-of-sorts
• Fuming mad
• In a tiff
• Quite cross
• Rather more than miffed
• Mucho mad
• Spitting nails, so to speak
• Really peeved
• Toyota Prius, e.g.
• Boiling over
• Very cross
• Really miffed