How do you play card game knucks?

"Knucks" is not a widely recognized card game. It's possible it's a regional or homemade game with a specific set of rules.

To help you out, I need more information. Could you please tell me:

* Where did you hear about this game? (A specific region, a friend, etc.)

* Do you know any specific rules or goals? (Is it a trick-taking game? A scoring game? What kind of cards are used?)

With more details, I can try to figure out what game you're referring to and explain how to play.