A speech defect in which s is pronounced like th in thickand z is pronounced like th in this.
Ex: Alfi has a lisp
Ex: Why do some people have lisps?
Ex: Life with a lisp is difficult
Ex: I was teased a lot at college because I spoke with a lisp.
Ex: I should mention now that I have a slight lisp
Ex: You think I have a lisp but I don’t know