big gunRate this phrase:(0.00 / 0 votes)Say it
A large-caliber artillery piece.

Additional definitions for 'big gun':

big gunSomeone who is powerful or influential most often in plural form.
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"big gun." Phrases.net. STANDS4 LLC, 2017. Web. 24 Nov. 2017. <http://www.phrases.net/phrase/big-gun_2378>.

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