It's in a really old Terry Pratchett book.
Dunno if he nicked it from somewhere else, though.
(
Mr. Tea dole-nonce-amuser extraordinaire,
Fri 13 Aug 2004, 18:20,
archived)
that's as they say
is the badger.
Well done to you, Sir.
(
Ravenous Bugblatter Beast This content may not be working. Please try again.,
Fri 13 Aug 2004, 18:55,
archived)