not to mince one's words; to speak frankly and directly without softening what one says.
彼女は歯に衣を着せない性格なので、会議ではいつも率直な意見を言う。
She doesn't mince her words, so she always speaks frankly in meetings.
上司にも歯に衣を着せない批評をする人がいるが、場によっては配慮が必要だ。
There are people who criticize their superiors without mincing words, but sometimes tact is necessary depending on the situation.
インタビューで彼は歯に衣を着せない答え方をして、視聴者の支持を集めた。
In the interview he answered without mincing words and gained viewers' support.