Can-uck, a contraction between Canadian and Fuck;
Used to describe a person from Canada that you have fucked, or are currently fucking.
Also used to describe a person from Canada that is an asshole, or a fuck.
I took this chubby bitch home last night, and found out she was a Canuck because she kept screaming "AYY!!" while I fucked her.
Chad Kroege, lead singer of Nickelback, is a Canuck.