smoking gun

noun

Definition of smoking gun

: something that serves as conclusive evidence or proof (as of a crime or scientific theory)

This document is the smoking gun that proves that he was lying.

Recent Examples on the Web

Burning grass, smoking gun The prairie sometimes burns naturally, as lightning strikes can spark wildfires. — Kiona N. Smith, Ars Technica, "Native Americans managed the prairie for better bison hunts," 25 July 2018 Turley blasts the media for promising for over a year bombshell, bombshell, bombshell, smoking gun. — Fox News, "Hannity: President Trump is on a tear, enacting his agenda," 4 Apr. 2018

Keep scrolling for more

More Definitions for smoking gun

smoking gun

noun

: a piece of evidence that clearly proves who did something or shows how something happened