Plumptious

Damn. I thought I had invented a new word ‘Plumptious’ – a word to describe the shape of a healthy, happy looking baby (used to describe daughter no. 2).

I am saddened gutted to find that it has already been coined.

Lusciously plump, can be used sarcastically as a back handed endearment.
she is very plumptious

(urban dictionary)