Top definition
The scientific measurement to determine how much or how little a person, place, or thing is saturated with the influence or likeness of Michael Phelps, Olympic Swimmer, upcoming video game star, and dude who occasionally gets photographed smoking questionable substances out of a thick, clear tube.
"I'm most excited about it's Michael Phelpsness!"
by Krakn3Dfx February 02, 2009
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