She was so full she was about to burst.
He was so full that he don't need eat for another decade.
Hyperbole means exaggeration. Since it is unlikely that someone can literally bounce off of the walls due to being "hyper" this would qualify as hyperbole.
Yes, "the mountain is full of firewood" is an example of hyperbole because it exaggerates to emphasize a point beyond what is literal and realistic. A mountain cannot literally be filled with firewood, so this statement is a form of exaggeration for effect.
my mouth is so hot it is like someone lit a match in my mouth
If a hyperbole is when you super exaggerate something, an example could be I am so tired I could just die here and now. Or I'm so tired I could sleep for a year.
If a hyperbole is when you super exaggerate something, an example could be I am so tired I could just die here and now. Or I'm so tired I could sleep for a year.
When someone exaggerates in a funny way
It's a hyperbole.
She is so beautiful she makes the sun seem dull
It is a metaphor.
you are the most beautiful person in the world
A hyperbole is an exaggeration, but more extreme. "I'm so hungry, I could eat a horse" is an example of a hyperbole.