口吐毒焰

lit. a mouth spitting with poisonous flames / to speak angrily to sb (idiom)

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls

to spit / to send out (silk from a silkworm, bolls from cotton flowers etc) / to say / to pour out (one's grievances)

to vomit / to throw up

poison / to poison / poisonous / malicious / cruel / fierce / narcotics

flame

variant of 焰[yan4]