What is Fat Lisp?
1.
1. A mouth injury caused by a punch, especially if the punch is the result of mocking another person's way of speaking.
2. A speech impediment caused by a punch in the mouth, especially if the punch is the result of mocking another person's way of speaking.
"What happened to your face, man?"
"I was making fun of that guy who talks like Mike Tyson and he gave me a fat lisp."
See