This is the 6910th most frequent German word.
fett
"Fett" in English means "fat."
Here, 'fett' describes the physical property of the milk, indicating it contains a high amount of fat.
Die Milch ist fett und sehr cremig.
The milk is fatty and very creamy.
In this sentence, 'fett' is used colloquially to mean 'rich' or 'well off', indicating a change in financial status.
Er hat im Lotto gewonnen und ist jetzt ganz fett drauf.
He won the lottery and is now quite well off.
Here, 'fett' is a slang term meaning 'cool' or 'awesome', showing subjective approval or enjoyment.