The Canadian Blubberwhale (similar to an Alabama Hotpocket) is a sexual act in which a man shits into a woman's fat fold, and then has sex with it. Another possible meaning is when the same as above occurs, but instead of having sex with a fatfold, a man then defecates into a condom, freezes it, and puts that into the fatfold (similar to an Alaskan Pipeline).
"Why does Beth smell like shit and cum?" "Oh, Bob gave her a good ol' Canadian Blubberwhale in her top fold."
by The Backspacer April 27, 2010