凉凉
Liáng liáng
With the popularity of the famous show 《三生三世十里桃花》, the term 凉凉 is actually the title of the ending song of the show.
The internet slang came about when a game streamer was playing the popular game PUBG (Player's unkown battleground) and when he died, he would say “凉了凉了”. 凉了 actually refers to death, or that the person is dead with no other options left. In a way, it is self-depreciating and self-mocking.
The audience or netizens would therefore reply with: "一首《凉凉》送给你。"
In a way, it is to show condolences as the song represents a sad love story between a couple torn apart by fate.
It can also be used with reference to one self.
For example: There is a test tomorrow and you have not studied for it at all. You would then say: “一首凉凉送给自己”
I would recommend everyone to check out the song!