Definition & Meaning of "let somebody have it"

What is the origin of the idiom "let someone have it" and when to use it?

The idiom "let someone have it" has its origins in a metaphorical extension of physical combat. Dating back to the early 20th century, it initially referred to delivering a forceful blow or attack. Over time, the expression evolved to include verbal confrontation or criticism, suggesting the delivery of a strong rebuke or scolding. The expression is used to convey a sense of confronting someone assertively or forcefully, either physically or verbally.