expression, i-adjective
saying too much; having a big mouth; adding unnecessary remarks
Describes a person who habitually adds an extra, often unwelcome or tactless, comment beyond what is needed. Used as a fixed adjective-like phrase.
彼は一言多いから、会議でよくトラブルになる。
He always says one word too many, so he often causes trouble in meetings.
あの人は一言多い性格で、つい余計なことを言
That person has a habit of saying too much and ends up blurting out unnecessary things.
Means talkative or chatty, without the negative nuance of adding unwelcome comments.
A set phrase combining 一言 (one word) and 多い (many, too much). The literal meaning 'one word too many' directly reflects the idiomatic sense.