你干脆把我杀掉吧！

Nǐ gāncuì bǎ wǒ shādiào ba!

You might as well kill me!

你天天花那么长时间吹头发，干脆把头发剪短吧！

Nǐ tiāntiān huā nàme cháng shíjiān chuī tóufa, gāncuì bǎ tóufa jiǎnduǎn ba!

You spend so much time every day blowing your hair dry, you might as well just cut your hair shorter!

你不喜欢他就干脆和他分手吧！

Nǐ bù xǐhuān tā jiù gāncuì hé tā fēnshǒu ba!

If you don't like him, simply break up with him!