tin-pot weasel
A sneaky, untrustworthy, autocratic upper-management type with zero credibility, but an inflated sense of self-worth. In the workday world, a tin-pot weasel is often also a PowerPoint Ranger.
Michael is a tin-pot weasel. He very seldom does what he says he will do, yet he threatens to fire anyone who does not scurry to fulfill his every whim, sneeringly referring to them as "sub-par."
tin-pot weasel by Monkey Serenade August 19, 2009
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