any of the indigenous creatures dwelling within the grody, unpleasant anal regions of the person. Agitation of said creatures may result in unpleasant conditions and relations between the person and their ass.
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
A crazy person who is dancing to dubstep and throwing things everywhere. Someone who is notorious for being a Crazemonkey, may sometimes be called a "Crazemonk"
Ronald: Dang! Jonathan is such a Crazemonkey to night!
Billy: He dances to that dubstep like no other Crazemonkey I've seen!
Jonathan: I AM SUCH A CRAZEMONK TODAY!