You hear the Stephen Fry/QI one about the Listerine slang?
Listerine meaning to not like Americans. The logic being that in rhyming slang an American is a septic so if you don't like them you're antiseptic and Listerine, obviously, is an antiseptic.:)
(
riverghost servicing your mum since,
Thu 11 Dec 2008, 9:02,
archived)