I had a letter from a company trying to flog me insurance.

我收到了一家公司的信，向我推销保险。

《牛津词典》

It is useless to flog a dead horse.

鞭死马无益；勿旧调重弹。

youdao

One of Mr Marchionne's best managers, Mr Wester was not being given the job to slim Alfa down or to flog it to VW.

韦斯特尔是马尔奇奥尼最优秀的经理人之一，若是要削减阿尔法经费或者卖给大众，根本不劳他出马。

youdao

Rather than trying to sell them more hardware, he developed new services to flog to them.

ECONOMIST: Reinventing Marconi

It will not be enough merely to flog products and services, no matter how individualised they are.

ECONOMIST: Idea

Now the country's research analysts have a platform from which to flog penny mining stocks and moose pastures.

FORBES: Split screen