Definition & Meaning of "game ball"in English

What does "game ball" mean in Irish slang?

In Irish slang, "game ball" is an expression used to show approval, excitement, or respect for someone, similar to saying "fair play" or "good on you." It became common in informal Irish-English speech, especially in social settings like sports, pubs, and everyday conversation where quick praise or encouragement is given. The phrase is used casually to react positively to someone's actions or attitude.