"beat one's brains in"的定义和意义

What is the origin of the idiom "bash one's brains in" and when to use it?

The origin of the idiom "bash one's brains in" or in the context of causing harm or death by striking someone in the head repeatedly is not rooted in a specific historical event or source. Instead, it is a grim expression that likely evolved over time from the literal description of inflicting severe head injuries. It reflects the violent nature of such actions and is used to emphasize the extreme and brutal nature of the harm inflicted upon an individual. This idiom does not have a known historical origin but is rather a metaphorical extension of the idea of physical violence.