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1. (popular) someone who having led others to believe one thing, does

a different thing; a promise-breaker;

2. (colloquial) someone whose general conduct, level of reliability,

relationship with truth, and past preformance leave him or her with

little to no credibility in peoples' opinion;
He did a real Bluemooner when he said he would kick people but didn't.
by Barry is my hero January 24, 2018
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