This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A person who blusters.

n. One who, or that which, blusters; a noisy swaggerer.

n. One who or that which blusters; especially, a swaggerer; a bully; a noisy, boastful, or boisterous fellow.

n. a person who causes trouble by speaking indiscreetly

"The synonyms were spot-on: big mouth, blusterer, boaster, braggart, line-shooter, loudmouth, and — my personal favorite — vaunter."

troubler    troublemaker    trouble maker    bad hat    mischief-maker   

swaggerer    bully    bouncer    roister    roisterer    buster    swasher    swash   

vaunter    roisterer    boaster    larrikin    untruthfulness    braggart    disinformation    cheaters    truth-teller    crewmember