Gravy meaning 'cool'?
There's nothing to be worried about.
It is all gravy.

Does 'gravy' mean 'good, ok' here? It is commonly used?

Question

Gravy meaning 'cool'?
There's nothing to be worried about.
It is all gravy.

Does 'gravy' mean 'good, ok' here? It is commonly used?

Answer

Yes, that's right in this context!
'Gravy' is pretty old fashioned slang though, so you might get some weird looks of you use it yourself.

Answer

Yes, 'gravy' means 'good/okay' in your sentence. I wouldn't say it is a common expression, though.

Answer

something additional or unexpected that is pleasing or valuable