shucker
Similar to an oyster it refers to someone or something very ugly on the outside but beautiful and fruitful on the inside.
A- Thanks for setting me up with that shucker we really had a good time.
B- I told you she was awesome. Is she a keeper or what?
A- To be honest I would say that is exactly what she is because I will do anything I can to keeper from from being seen with me in public
B- Asshole