BSE stands for...
bovine spongiform encephalopathy.
( davelog, Fri 26 Dec 2003, 7:24, archived)

As opposed to BSkyB which is mad satellite tv disease
Spread by Rupert Murdoch's heavies.
( Zak Canard - I remember this place, vaguely, Fri 26 Dec 2003, 11:50, archived)