Hey Tatyana, let's see if i can explain that. :) If someone tells you a joke or a story that is extremely funny, he could warn you like that. It says that it is so funny that you could laugh yourself to death. "This story is so funny, you might die laughing when you hear it!" "Be careful when you look at it, you might die laughing." I hope i was able to help you and i'd be happy about a "thumb up!". :)

Something is so funny that there is a possibility that you can die laughing at it. Not literally.

It is a way for saying that 'you will be laughing quite a lot'. Actually it is possible to 'die of laugh', as a very intense laugh could cause fainting (I am talking through experience up to this point) due to an abnormal breathing conditions and other mechanisms, and fainting -- depending on the context, for instance while driving -- could lead do death.

At the end of his life, no fear and fear, very perfect end this life, no regrets, or before the end of life, do a make themselves happy thing 在他生命的尽头，没有恐惧和害怕，很完美的结束这样的生活，没有遗憾，或结束之前的生活，做一个让自己开心的事情