n. — Food & Drink
a cup of coffee with two servings of cream and sugar.
Type: 1. Origin — The term originates with Tim Hortons coffee chain (see Image 1), a Canadian doughnut and coffee franchise. Originally founded in 1964 in Hamilton, Ont., by former Toronto Maple Leafs defender Tim Horton and Ron Jocye, it was called "Tim Horton's". While the apostrophe was later dropped, the coffee franchise became synonymous with Canada in many contexts (Joyce and Thompson 2006: 232-233). By the turn of the millennium, the chain had been embraced by large portions of the Canadian population in a rare act of identity creation involving a low-cost coffee franchise. Other terms such as "triple-triple" (three sugars and creams) and "4x4" (four sugars and four creams) also exist, but are not as popular. Today, double-double is still mostly associated with the coffee franchise (see Image 1 where the term is used for the promotion of a Tim Hortons credit card). The association is strong, to the extent that it is used in attacks against the chain (see the 2012 quotation). Occasionally it can be found outside of a Tim Hortons context, but this process of semantic generalization does not seem to have taken place widely at this point. Image 2 offers evidence for the term's enregisterment (Agha 2006) in popular culture.
See also COD-2, s.v. "double-double", which is marked "Cdn".
See also: dutchie Timbits (meaning 1)
Images:

Image 1: A Tim Hortons double-double. Photo: B. Ford 
Image 2: Button for double-double