This is the 7296th most frequent Spanish word.
gordo
Fat.
The word 'gordo' in this sentence is used as an adjective to describe the physical condition of the cat.
Tengo un gato muy gordo.
I have a very fat cat.
Here, 'Gordo' is used as a nickname in an affectionate manner, addressing someone directly.
Gordo, ¿quieres ir al cine esta noche?
Buddy, do you want to go to the movies tonight?
In this context, 'gordo' is describing the size or density of the cake, usually indicating it is substantial or rich.