I would say the usual not too fat and not too little fat just the right amount is phat.
So… would the be a minimum of 20% Phat but not to exceed 30% Phat???
Or would that be an excessive 100% Phat?
For now, I am opting for the “Big Phatty” (Voyager) with its 100% Phat 
Geez, I feel like I ordering food from a burger joint!
I thought this was Moog not McDonalds!
Just had a thought!
If the Voyager is the “Big Phatty” with 100% Phat…
does that mean EACH oscillator has 33.3% Phatness
Therefore, a “Little Phatty”, having 2 oscillators, has 66.6% Phatness…
and the Big Phatty Voyager, having 3 oscillators, has 99.9% Phatness
Unless my math is all wrong!
So the Little Phatty is Devilish 66.6 
Its one WICKED little synth alright!