My friends and I came up with a list of such cultural misnomers:

French fries, French vanilla, French kissing, French braid, French onion dip...oh man, I can't remember the rest! Anyone else got some?

And what belMarduk calls strip bacon I would call side bacon. She's right, normally you don't find back bacon in your run-of-the-mill store. I always got confused about the Canadian bacon thing myself.