shit up my dog's ass 

An expletive of Canadian origin, specifically southern Ontario. Can be used as an expression of surprise or disbelief.

Whilst playing hockey and/or curling: "Shit up my dog's ass, it's cold!" Alternately, Pierre: "Can you believe the Canadian Olympic hockey team is seeded lower than those lousy commie Ruskies?" Piet: "Shit up my dog's ass!"

shit up my dog's ass by shittinginwindsor March 14, 2008