1 definition by DanOOOOOOO

Top Definition
The act of either eating a lot or exercising a lot.
I just got done phelpsing, I just had 8 eggs, 5 pieces of toast, and half a pound of sausage.

or

John was phelpsing for 4 hours, he practically lived in the gym today.
by DanOOOOOOO September 22, 2008

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