Lisp
A lisp is a speech impediment that causes a person to pronounce 's' and 'z' incorrectly. There are several types of lisps, but the most well-known type is the interdental/frontal lisp, which uses the English 'th' sounds (θ as in "thistle" or ð as in "this'll").
When I'm wearing my retainer, it makes me talk with a slight lisp. I've gotten the hang of it, but sometimes it still thlips out.
Lisp by Kirby235711 May 2, 2020
lisp
Very quiet
LISP
LISP by Haru and Lank November 5, 2010