A lisp is a speech impediment. Stereotypically, people with a
lisp are unable to pronounce sibilants (like the sound [s]), and
replace them with interdentals (like the sound [θ]), though
there are actually several kinds of lisp. In one of these, the
sounds become lateralized; the symbols for this in the Extended
International Phonetic Alphabet for speech disorders are [ʪ] and
[ʫ]. Speakers of Latin American Spanish often think that
speakers of Castilian Spanish speak with a Castilian lisp. The
interdental lisp is actually standard in the Turkmen language.
Notable people that had or have lisps include Thomas Jefferson
(who preferred writing to public speaking partly because of
this), the rapper Anybody Killa, Mike Tyson, and Nat King Cole
(in his early career). John Adams also had a lisp in his later
years, but this was because he refused to wear dentures. The
biblical figure Moses is described as having "slow speech and a
slow tongue" (Exodus 4:10), which is traditionally interpreted
as a lisp, though others