The act of filling a male's asshole with maple syrup while rubbing his moose knuckle at the same time, usually with a "Y" hand shape to represent antlers.
Canadian 1: "Did you hear that gilbert did some Canadian Maplefucking last night?"
American 1: WHAT THE HELL IS CANADIAN MAPLEFUCKING???
The unholy matrimony of the two individuals named "Pier" and "Gilbert" which will always end up in a divorce.
Gilbert would be repulsed by this, therefore Pierbert never existing.