A speech defect where 's' and 'z' sounds are pronounced as 'th'.
From Old English 'wlisp', meaning 'stammering'. The word itself ironically contains the very sound that people with this condition struggle to pronounce correctly, making it somewhat self-demonstrating.
The word 'lisp' is cruelly ironic since it contains the 's' sound that people with this condition find difficult. Many famous figures including Winston Churchill and Marilyn Monroe had lisps, often adding to their distinctive charm and memorability.
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