Rocket is a guardian of the galaxy, He's an experimental raccoon that escaped. He's nothing the only one, he got out with a dragon, Jax. She can talk and everything, she even has a human form, she's a successful experiment.

Rocket and Jax are both guardian's, but no one knows they are dating. Jax is sassy and rocket loves it... Gamora and Peter are making Jax mad so she gets sassy

Jax: I'm gonna shove my foot where is shouldn't be.

Gamora: do I have to guess?

Rocket: Your ass