the.com/loose cannon
Unpredictable, uncontrolled, and somehow still invited to the meeting.
means A person who acts unpredictably and without regard for consequences, often causing chaos for the group they're part of.
from Straight from naval history: on old warships, cannons were massive and mounted on wheeled carriages, lashed down with rope. In rough seas, a cannon that broke free of its restraints would roll wildly across the deck, crushing anything in its path — a genuine, documented hazard of life at sea. The phrase crossed into figurative use in the 1800s and 1900s, describing people as dangerously unmoored as that unsecured gun.
- origin
- actual cannon rolling loose on ship decks
- danger
- could crush crew or sink the ship itself
- modern use
- first recorded figuratively in 1800s politics
- irony
- often the most effective person in the room