I have a bump on my right pinky, it's been there for about 2 years.. perhaps more. it doesn't hurt at all?

No problem: if you have had for 2 years and it is not getting bigger,leave it alone and don't worry.

Is it immobile: I.e. Does it not move at all if u try to move it from side to side? Does it seem glued to the bone? Or is it freely mobile and soft, like a soft tissue cyst? Does it hurt if u press on it? These are questions a healthcare provider should ask you to examine and give you a diagnosis.