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1.
An Internet reviewer who exaggerates ratings, consistently giving either the worst or best possible score to any reviewed item.

Compare hemiastrist.

Origin: Greek HYPER (over, above) + ASTER (star)
"I don't think this hyperastrist realizes that 'OMGZ BEST MOVIE EVER!!!1' fails to capture the full scope and essence of the film."
by Gurn Blandston December 13, 2007