An obese white male wearing a blue shirt and khaki shorts sits in front of fountain all while gabbing on phone.
A man is talking outside on his phone.
A fountain is an object generally found outside. Gabbing is a form of talking usually associated with a phone in hand.
A white male is a type of man, and "gabbing on phone" is another way of saying "talking on phone".
If he's in front of a fountain he is outside.