The Collaborative International Dictionary
loud-mouth
loud-mouth \loud-mouth\ n.
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a person who causes trouble by speaking indiscretely.
Syn: loudmouth, blusterer.
Aperson who is loud-mouthed.
Usage examples of "loud-mouth".
It was for dealing with loud-mouthed skiers and their giggling bunnies that God said, on the eighth day, let there also be handguns!
Just about eligible to travel with this bilk here--Shadbelly Higgins--this loud-mouthed sneak that shoots people in the back and calls himself a desperado.