blow in the bag

verb

To supply a specimen of breath for alcohol analysis.

Meanings

verbblow in the bag (third-person singular simple present blows in the bag, present participle blowing in the bag, simple past blew in the bag, past participle blown in the bag)

present singular third person blows in the bag · participle present blowing in the bag · past blew in the bag · participle past blown in the bag

  1. datedinformalTo supply a specimen of breath for alcohol analysis.

Origin

From the previous use of a plastic bag over the end of a breathalyser, to measure a specific amount of breath.

Full word history & related roots →
Cite this entry
APA

blow in the bag. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/blow%20in%20the%20bag

MLA

“blow in the bag.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/blow%20in%20the%20bag. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “blow in the bag,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/blow%20in%20the%20bag.

Source: blow in the bag on Wiktionary, CC BY-SA 4.0.