1.
insult, bad-mouthing, speaking ill of someone
Negative or malicious talk about a person, often behind their back. Covers everything from mild gossip to harsh verbal abuse.
Pronunciation
The standard modern reading is わるぐち. The reading わるくち also exists but is less common in everyday speech.
Usage
The most common collocation is 悪口を言う (to say bad things about someone, to bad-mouth). The word often implies talking about someone negatively in their absence.
Common collocations
Related Words
Synonym:
陰口 (talking behind someone's back)
Related:
減らず口 (backtalk)
Compare:
恨み言 (words of resentment)