And you thought Brian Mulroney had a potty mouth?

...And I quote:

During his years in Finance, Martin's temper was legendary. His tirades were called "beatings" by members of his staff. On one occasion, an aide contradicted him by quoting the 1993 Liberal campaign platform, known as the Red Book. Martin responded by saying, "Screw the Red Book ... Don't tell me what's in the Red Book. I wrote the goddamned thing. And I know that it's a lot of crap."

Paul Martin Bio
(Source: Double Vision: The Inside Story of The Liberals in Power, by E. Greenspon & T. Wilson-Smith.)