A variation on the 'Double-Double' a typical Canadian way of preparing coffee, made by putting two portions of milk, and two packets of sugar into black filter-prepared coffee.
The Maple Double-Double is created by putting two portions of milk/creamer and two small diner-packets of maple syrup.
Outside of a greasy spoon cafeteria setting this can be replicated with two splashes of milk and syrup from the bottle.
"I'll take a plate of Poutine, two glazed Tim-Bits, and a Maple Double-Double please."
"My roommate used all of my Real Maple Syrup, leaving me nothing but Mrs. Butterworth's for my Maple Double-Double!"