Top definition
The way by which a man measures his level of fitness. If his body mass becomes too large he will not be able to see his penis in which case he is overweight; however, if he is able to look down and see his penis, everything is good.
Situation 1:
Wife: "You are putting on too much weight."

Husband:(Looks down and sees Penis) "Nope I'm good, my penis to mass ratio is normal."

Situation 2:
Doctor: You need to lose some weight if you want to stay healthy"

Patient: "I thought so to, but I got a boner this morning and my penis to mass ratio seems fine."

Doctor: "What?"
by cmoney55 September 09, 2011
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