2 definitions by daddyD

Top Definition
If It Fits Your Macros (Refers to diet, google macros if you don't know what they are.) Usually used in Forums
OP: So I can eat pop tarts and still get ripped??

Reply: IIFYM.
by DaddyD June 15, 2012

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One who is practiced in picking through others shit and exam imines it carefully.
Hey stop looking through my shit! What are you a Shitologist?
by daddyD October 19, 2005

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