It is impolite to say dirty words.

说脏话是不礼貌的。

youdao

Don't scribble dirty words on lavatory walls.

别在厕所墙上乱写下流话。

youdao

He usually calls other's name without saying dirty words.

他经常骂人不带脏字儿。

youdao

You have to learn, in other words, how to get your hands dirty. Between the innocence of the Christian and the worldliness of Machiavelli's new morality, there can be no reconciliation.

换句话说，你必须学会如何弄污你的手,在基督教的纯洁观与,马基雅维利新道德中的世俗观之间,没有任何回旋的余地。

耶鲁公开课 - 政治哲学导论课程节选

The fabliaux are filled with puns, clever rhyme schemes, dirty words and double entendres.

WSJ: A Fresh, Frisky Look at Medieval Times

More than half said using dirty words at work makes an employee appear less intelligent.

FORBES: Dirty Words Can Cost You a Promotion

Though clearly not to everyone's taste, the likes of Peter Cook and Dudley Moore's Derek and Clive sketches and George Carlin's Seven Dirty Words routine have influenced generations of humorists.

BBC: Should swearing be against the law?