If you're still not sure what a clapback is, this Twitter exchange is a perfect example. It starts with a pretty average dig at Iggy Azalea, but ends with a remarkable scientific feat:
Here's the conversation as it happened:
After a clapback like that, there was only one thing this guy could do:
He literally had to delete his Twitter account.
Way to go, @GeauxGabby! Also for the tumor shrinkage thing. That's cool too.