When someone who isn't Canadian
a) Celebrates a Canadian holiday to get off work (e.g. Canada Day)
b) Talks with a pseudo-Canadian accent (e.g. Minnesotans)
c) Pretends to be Canadian overseas to avoid the hassles of being an American (e.g. George Clooney's character in Syriana).
John: I can't come into work tomorrow so I can celebrate Canada Day.
Pete: Oh yeah? You're not even Canadian! More like fauxnadian! I'll see you tomorrow.
John: Let's get some beers, eh?
Pete: Stop being a fauxnadian.
Pierre: Stupid American!
John: Oh yeah? I'm Canadian you stupid frog!
Pierre: Well then let me get you a baguette!