Derived from the phrase or name "Funky Monkey". It is described as a person who expresses one's self in a funky and comical way, making no sense in their actions or words. One who is comically spontaneous resulting in no logical or mature explanation of their actions or outbursts. A person who sees themselves as funny, while others see them as odd or weird. One who does or says things, to entertain one's self at the disposal of others, such as telling jokes that make no sense, just to see the expressions on other's faces, and watching reactions from others.
Joe: "Hey man, did you see that? I just wiped my mind with a burger wrapper!"
This is an action that usually takes place on Spite Monkey Sunday, some little prat decides that they can best get their self-aggrandising definition accepted by making multiple submissions. They then decide to try to improve their chances by voting against any other definition that has been submitted, a typical demonstration of the spite monkey mentality. The end result of their self-centred, immature nastiness is to effectively bring Urban Dictionary to a standstill.