Definition & Meaning of "knacked"in English

What does "knacked" mean in Irish slang?

In Irish slang, "knacked" means extremely tired, worn out, or completely exhausted, usually after physical effort, long work, or intense activity such as sport. It is commonly used in informal Irish English in everyday conversation to describe a strong level of fatigue, where a person has little or no energy left. The term became widespread through casual spoken usage in Ireland and is still regularly heard in modern speech, especially among younger speakers and in working or social contexts.