(Verb) To eat an inhuman amount of nourishment and then justify the act by exercising as much as an animal, such as a fish.
Alternate definition: The act of being caught performing something illegal, such as smokingmarijuana.
Man's Friend: Holy... Wow. How can you eat 17 extra large pizzas and 8 boxes of breadsticks?
Man: Don't worry, I'm gonna Michael Phelps it.
Man's Firend: What?
Man's: Nothing. I'll see you later. I'm gonna run around the... Moon.