What part of speech is fat?

The word "fat" can be several parts of speech depending on how it's used:

* Adjective: Describing something as containing a lot of fat.

* Example: "She ate a fat burger."

* Noun: Referring to a type of bodily tissue or a substance that is oily or greasy.

* Example: "Animal fat is used in cooking."

* Verb (informal): Meaning to become larger or fatter.

* Example: "He fatted himself up on cake."

To determine the part of speech, you need to look at the sentence and how the word is being used.