Blow off steam

Meaning

Release pent-up energy or frustration.

Usage

Common after stressful events.

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.

Refers to safety valves letting steam escape from engines.

Industrial Revolution metaphor used in human emotions.