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2.
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
 
1.
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
 
3.
A word refering to someone really liking the singer Katharine McPhee, as if a person would have a fever.
I have McPheever!
Katharine McPhee is so good, she's starting to give me McPheever!
by Kat Lover September 23, 2007