To lose games when originally up 2-0. This refers to the NHL team the Vancouver Canucks, who bring enormous grief to its fans by continually blowing 2-0 leads.
"What the hell man, they had a 2-0 lead going into the second and they blew it!"
"Yeah, they totally canuck'd it."
"Yeah, they totally canuck'd it."
by Scruffles the dog April 3, 2008