What is a fat Interface?

Question

Ciao, I work in movie industry to simulate and apply studio effects. May I ask what is a fat interface as I hear someone online around here stating it ?

Edit: It is

Answer 1

very simple explanation is here:

The Fat Interface approach [...]: in addition to the core services (that are part of the thin interface) it also offers a rich set of services that satisfy common needs of client code. Clearly, with such classes the amount of client code that needs to be written is smaller.

When should we use fat interfaces? If a class is expected to have a long life span or if a class is expected to have many clients it should offer a fat interface.