If you actually clicked on this with the intention of doing that, you are a meanie 🙁
Words on tech street via a security researcher has discovered that there is a way for meanies to crash your Whatsapp
The meanie doing this will need to use the web version of Whatsapp to send a message containing 5,000 emoji to another person. This will completely shut down the app and deleting the message history is the only way to continue using the app after it crashes.
So how did Mr. Indrajet come about this bug, it appears that Whatsapp has a character limit of 6000 words, however, the 5000 emojis is more potent enough to make it crash.
If you are truly a meanie, how about trying it out.