Fat Breath, when one is potbellied, blubbery , plump, voluptuous, weighty, double-chinned, corpulent, jowly, pudgy, tubby, roly-poly, fattish, fleshy, portly, stout or chunky. Typically means that the individual either:
1. Has the odor of rancid lard
2. Is fat in general, and is used as a nic-name.
"Hey Fat Breath, did you want to upsize your fries?"
When one is not fat but breaths heavily like a fat person when performing any sort of activities.
Stacy: I hate going up these stairs!
June: Me too! It's only one flight but I always get fat breath when I reach the top.