Curious George always wondered what the Man in the Yellow Hat has been smoking lately that smelled so good. And so George then sneaked into a weed cabinet which the Man in the Yellow Hat has left unattended, grabbed a few J's and a lighter and then started enjoying himself. He could not stop afterwards. What a grass monkey he now is!
Mark H. Proud Urban Dictionary author since February 2004.
A ghetto drank. Made by filling a cup half full with Busch Light. Then you peel a fresh orange. Squeeze the orange into the drank. After the orange is fully squeezed pour the rest of the Busch Light into the cup. Drink the Grass Monkey.
A Grass Monkey is Busch Light filled with a squeezed orange.