Low blow

Meaning

An unfair or hurtful remark.

Usage

Used when someone crosses the line verbally.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Boxing term for hitting below the belt.

Boxing rules codified the low blow in the early 20th century.