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The video of Katharine McPhee's "Over It" has McPhee making a lot of mouth shapes that could easily accommodate the imagination of men and women . . . with a penis either inside or very near. A penis drawn near a screenshot of one of these mouth shapes is a McPheenis.

Also used to describe a penis that has been ... used ... while watching videos of or looking at photos of Katharine McPhee.
"My McPheenis was all over the latest episode of 'Scorpion'.
by UrboDiktus November 16, 2016
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