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1.
A mixture of Four Loko and orange juice. A play on the traditional "brass monkey," consisting of a 40 of malt liquor and OJ.

Also known as "an even poorer man's mimosa."
Four Loko and orange juice? That is one tasty crass monkey!
by jgoodson28 January 23, 2011
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2.
An 'out of the ordinary' individual who just by being themselves, will constantly commit faux pas perceived as lude or inappropriate.
Things a crassmonkey might do:
*Eat Swedish Fish found on a park bench
*Pick his nose in public
*Eat the butt end roach of a joint to refrain from wasting pot
*Burp often
by Newbury December 29, 2004
8 0