Definitions

1. noun

a speech defect in which the tongue is placed between the teeth, causing the consonants /s/, /z/, /θ/, and /ð/ to be pronounced with a soft ‘l’ sound.

“He had to overcome his lisp before he could confidently give presentations.”

2. verb

to speak with a lisp, or to speak in a way that is considered to be childish or immature.

“The comedian lisp-ed his way through the comedy routine, entertaining the audience with his silly impressions.”