balloonimous 

Of or like a balloon.

He had become so completely full of himself; his head was balloonimous.

balloonimous by Dr Bunnygirl August 2, 2019

Balltonomous 

It's totally an adjective to elegantly describe a nice round object with upmost admiration & respect.
~DarkAndersonEX

Person 1: Hey that's a pretty round ball
Person 2: Do you mean a balltonomous ball?
Person 1: Yeah, that!

Balltonomous by Asami Salami November 16, 2017