Another way to say "giving the finger" or "flipping the bird" which is primarily used in Canada. This is after a famous incident of former Prime Minister Pierre Trudeau, who gave the finger to a group of protesters who were yelling anti-french sayings at him.
Billy - "That guy wouldn't leave me alone, so I gave him the Trudeau salute."
Up yours, Fuck you, Asshole, Flipping the Bird.
The Trudeau Salute; Raising the middle finger to a symbol of authority or power, or the Media. Canadian Prime Minister Pierre Trudeau famously flipped the bird to reporters and others in the 1970's.