Anyone know of a card game called Kings and Gravel suckers?

It's highly unlikely that a card game called "Kings and Gravel Suckers" exists.

There are a few reasons why this is probably not a real game:

* Unusual Name: The name is quite strange and doesn't follow typical card game naming conventions.

* Lack of Online Presence: A quick search online doesn't reveal any results for a game with that name.

* Regionalism: It's possible the name is a slang term used for a particular game in a very specific location, but without more information, it's difficult to say.

If you have any further details about the game (like where you heard about it, what kind of cards are used, or any gameplay details), it might be easier to identify it.