I'm festively plump
You use this when you're so full you look like a holiday gift and you're too happy to care.
I said, 'I'm festively plump!' after I ate six cookies and my shirt was stretched out.
When my friend said I looked like a wrapped gift, I said, 'I'm festively plump!' and laughed.
I told my cousin, 'I'm festively plump!' when he said I looked like a present that was opened too early.