I grew up in Ottawa, but now I live in saskatchewan. I keep calling teh grocery store Loblaws, and NO ONE HERE KNOWS WHAT IT IS. Everyone goes to Safeway or Extra Foods/Superstore - who are owned by Loblaws, but apparently no one outside Ontario actually has stores called Loblaws.
I also call our power bill the Hydro bill... and again, no one here knows what I mean. I guess out here we don't really use as much hydroelectric power, or else we just don't have "hydro" in the name of the power plants...