adjective
fatter; fattest
having a lot of extra flesh on your body :having a lot of body fat
Fat can be an insulting word when it is used to describe a person.
having a full, rounded form
A fat lip is a lip that is swollen because of injury, especially from being punched.
unusually wide or thick
informal :containing, providing, or costing a large amount of money
informal + disapproving :successful or wealthy
baseball :easy to hit
big fat
used for emphasis
fat chance
it ain't over until/till the fat lady sings
noun
plural fats
[noncount] :the soft flesh on the bodies of people and animals that helps keep the body warm and is used to store energy
an oily solid or liquid substance in food [noncount]
[noncount] :an amount that is more than what is usual or needed :excess
chew the fat
live off/on the fat of the land
To live off/on the fat of the land is to live very well, enjoying the best things that are available without having to work hard to get those things.