This is Thoreau's pet phrase.

这是梭罗的口头禅。

What is your pet phrase?

你的口头禅是什么？

This is her pet phrase .

这是她的口头禅。

I want my name as a pet phrase of people.

我缺一个把我名字当成口头禅的人。

Pet phrase: I am the only drawback is that pure.

口头禅：我唯一的缺点是纯洁。