Gossip and accusations are often substantiated by fact.

The smoke from cigarettes, especially in an enclosed environment, that any person including non-smokers could breathe in.

(UK, US, Australia, Canada, New Zealand) If there is a hint of something occurring it could indeed be true, but such rumors should be taken with a grain of salt. / (humorous) all rumors are true

(idiomatic, simile) To smoke tobacco frequently.

To catch fire and burn. / (idiomatic, by extension) To be completely ruined or devastated.

(idiomatic, humorous) Used to express surprise about someone's uncharacteristic or wacky, offbeat past actions.

(idiomatic) A place where powerful people meet to decide a matter in secret, often of a political nature. / Used other than figuratively or idiomatically: see smoke, filled, room.

plural of smoke-filled room

(rhetorical question, informal) Indicates that the interlocutor (more precisely, the one being asked the question) is acting in a crazy or unprecedented way.

(rare) To acquiesce in some falsehood; to make pretence.