A person who has become a complete and utter follower of another group or person. He/she will act on their whim without any thought about how stupid he/she will look or the consequences of said actions. They are usually regarded with a mixture of contempt and amusement by those whom they "serve"
"he's not their friend, he's just their monkey butler"
"hey man, get me a beer"
"fuck off, make the monkey butler do it"
A disgusting STD a girl can aquire from sleeping with too many players. Signs include exessive hair, natural ability to climb trees, a constant need for bananas, and an unhealthy addiction for the game Mario Cart.
Girl #1: We've been playing Mario Cart for almost 10 hours straight now!
Girl#2: Do you think we could've gotten Monkey Shit from sleeping with too many guys this past summer?