[duō zuǐ]
（不该说而说） speak out of turn; gossipy; long-tongued; shoot off one's mouth; talk too much or out of place
If he hadn't shot his mouth off, things couldn't have been so awkward.
要不是他多嘴， 事情也不至于搞僵。
You don't know the facts, so keep your mouth shut!
你不了解情况， 别多嘴!
[机] （多喷嘴的） multinozzle