Mr. Simpson (Ford Kiernan) is a recurring character from the Scottish sketch comedy series "Chewin' the Fat". He is man with a whistling lisp, which often gets satirised by other people by having him say a phrase with the pronunciation of the letter "S" strewn throughout, such as his niece and nephew having him read "The Night Before Christmas" from the beginning (the sketch begins with him finishing it, on the last sentence where the letter "S" not present.) So he reads it as (lisps are in capitals) "TwaS the night before ChristmaS, and all through the houSe, not a creature waS stirring, not even a mouSe."