1. Someone who tweets more than a tweet whore. A tweet monkey tweets every few seconds, and they usually type very fast with bad spelling and grammar.
2. A monkey that tweets.
Leonard- Bill, you tweet so much, you're not even a tweet whore.
Bill- So what am I, if you're so smart?
Leonard- A tweet monkey
Leonard- I just bought a tweet monkey from the zoo.
Someone who tweets even more than a tweet whore. Tweet monkeys tweet every few seconds.
Bill- "Leonard, you tweet too much. Even more than a tweet whore."
Leonard- "So, what does that make me?"
Bill- "A tweet monkey"