When you're a Canadian and you want to explain something to an American and he just won't get it, you use the term to basically say fuck you, I'm a Canadian.
Ex: Trying to tell him why you love hockey so much, and he's like "Yo, bro, I just don't get it." and you're like, "Dude, go fuck on ice eh."
A person who is extremely arrogant about their inferior ice cream preferences to the point that they deminish other people's ice cream preferences. They of course will eat any ice cream, but make sure everyone in the room knows that the ice cream is inferior.
The ice cream fucktard asked for a scoop of my Blue Bell, and then had the audacity to complain that it wasn't Scoops ice cream.