2. never something that goes on pasta - that is by definition sauce.
3.something nice or pleasurable, usually used in the future sense
"No thank you. I prefer sauce."
"My boss said I'll probably get a raise. That extra money would be gravy."
If something is better than gravy, it is 'gravy on eggos,' by the way. Sometimes 'gravy on rice' is used in place of that , but you can put gravy on anything and it means everything is great, ok and without problem to the max. 'Gravy on potatoes' is a good one too...
"No worries, it's all gravy."
"How's your day going."
"All gravy, baby."