Buttbear
A nickname given to someone when they act in an awkward or derpy way that is more indearing than anything else. This term can also be used to describe derpy/rolypoly animals.
Zack: "I just tried to enter through the exit and totally crashed into the door."
Kendra: "Awww, you little buttbear!"
Kendra: "Awww, you little buttbear!"