to act really stupid or in an embarrassing matter.

comes from a new york post columnist in the 1970s who made a fool of himself. he was known in the new york journalistic community for making stupid jokes and laughing at them when nobody else would. this is commonly used among journalists in new york to describe someone who is a joke and not worth taking seriously.
Joe's presentation had him max-rothsteining frantically. It was terribly prepared and had no content, getting him a bad grade.
by jack finkels August 25, 2005
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