Canadiache Share definition Flag A headache specifically brought on from dealing with pain in the ass Canadians. Dude, I sent the parts exactly as he requested and now he's complaining about paying duty fees. This bozo is giving me a Canadiache! Canadiache by PartsMan February 25, 2011 0 0 Get merch Get the Canadiache mug. Buy Now — $32.95 See more merch