Enthusiasm for Katherine McPhee, one of "American Idol's" fifth-season contestants. The word is a portmanteau between "McPhee" and "fever."
Katherine McPhee wasn't voted off, last night. America must really have McPheever.
by Crow McLachlan May 16, 2006
Somebody who is a fan of Katharine Mcphee from the hit reality show, American Idol, and is a huge fan, who cant get enough of katharine. Its a made up illness in related to the "fever".
"I've caught the mcpheever! Im gonna go play some Katharine songs now"
by Jenx April 28, 2006