A lisp is a speech impairment in which a person misarticulates...
wikipedia - 25 May 2022A lisp is a speech impairment in which a person misarticulates sibilants ([s], [z], [ts], [dz], [ʃ], [ʒ], [tʃ], [dʒ]).[1] These misarticulations often result in unclear speech.