Pie-Hole would be someone that talks or eats too much?
Lucky's going on 5 years accident free?
Frog is a French foriegn national?
Dean Wormer reminded somebody of Dean Wormer (RIP) ?

I don't know any of thesse people, but the difference is unlike 15 year old punks you don't get to choose your nickname, highly uncool to choose your nickname, no one will call you that. Usually they are somewhat derogatory as well, EVERYONE would have to like you to get anything complimentary like.
I was "Slambone" for years due to the amusing (not to me) sound my head made when I accidently did a slow speed endo into the pavement with my forehead while adjusting my front brakes at the standby.