搜索老同学 Ding Lei，结果连到了 Urban Dictionary。

A cantonese phrase that literally means ‘poke at your lungs’. English equivalent can be piss off, fuck off, fuck, shit, shut up, etc. Also abbreviated to Ding.
Hongkie A: Hey your mother is fat.
Hongkie B: Ding lei gor fay! So is your dad!

Hongkie Boyfriend to late girlfriend: Ding lei gor fay, how many times do I have to tell you to be ready when I come over.

顶你个肺。