expression, noun
what people say; gossip; rumors
Refers to public talk, gossip, or rumors circulating in society. Often used in contexts about reputation or what others might say.
世間の口がうるさいから、行動には気をつけよう。
People will talk, so let's be careful about our actions.
あの事件は世間の口に上りやすい話題だ。
That incident is a topic that easily becomes the talk of the town.
評判 is reputation or public estimation, often with a positive or negative evaluation, whereas 世間の口 is neutral talk or gossip itself.
A set phrase combining 世間 (society, the world of people) and 口 (mouth), literally 'the mouth of society', meaning public talk or gossip.