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Related to smoking: Cigarette smoking
Indisputably incriminating evidence. Likened to a gun that is still smoking after having been fired. A smoking gun was revealed in the form of emails documenting the man's involvement in the money laundering scheme. So far the prosecutor has presented only circumstantial evidence, but she's expected to reveal a smoking gun against the defendant soon.
what was (one) smoking
slang What were you thinking? Used to express confusion, annoyance, or surprise at someone's past actions. The phrase alludes to drug use. What were you smoking when you picked out this hideous wallpaper? What were we smoking when we thought a flight at 6 AM was a good idea?
smoke (someone or something) out
1. Literally, to fill a space with smoke to force a person or animal out of hiding. The terrorists are in the center of the building, and will surely kill any officers who try to enter. I think out best bet is to use our try and smoke them out. Back on the farm, we used to smoke out rats by running a hose from the exhaust pipe of our pickup truck into their nest.
2. To expose someone or something and bring it to the attention of the public. We were able to smoke out the crooked cop by hiding a microphone in the back alley where he took bribes from criminals. The newspaper smoked out the government's illegal use of torture to extract information from prisoners during the war.
the smoking gun
Fig. the indisputable sign of guilt. (Fig. on a murderer being caught just after shooting the victim.) Mr. south was left holding the smoking gun. The chief of staff decided that the the aide should be found with the smoking gun.
Something that serves as indisputable evidence or proof, especially of a crime. For example, There is no smoking gun in the Oval Office; the President had no role in tampering with the evidence . This expression alludes to the smoke coming from a recently discharged firearm, a normal occurrence until the invention of smokeless powder. [Mid-1900s]
a smoking gun
COMMON If you talk about a smoking gun, you mean a piece of evidence which proves that a particular person is definitely responsible for a crime. The search for other kinds of evidence failed to produce a smoking gun. First of all, there's no smoking gun. In the course of our investigation we did not find a single piece of evidence.
a smoking gun (or pistol)a piece of incontrovertible evidence.
This phrase draws on the assumption, a staple of detective fiction, that the person found with a recently fired gun must be the guilty party. The use of the phrase in the late 20th century was particularly associated with the Watergate scandal in the early 1970s involving the US President Richard Nixon . When one of the Watergate tapes revealed Nixon's wish to limit the FBI's role in the investigation, Barber B. Conable famously commented: ‘I guess we have found the smoking pistol, haven't we?’
1998 New Scientist This genetic smoking gun is evidence of a migration out of Asia that is hard to refute.
a/the ˌsmoking ˈgunsomething that seems to prove that somebody has done something wrong or illegal: This memo could be the smoking gun that investigators have been looking for.
n. the indisputable sign of guilt. The chief of staff decided that the admiral should be found with the smoking gun.