There are sooooo many! Where to start?
Thumper (Dad gave me that one when i was still in utero - guess I was a fetus with a kick
)
Rabbit (Another one of my Dad's - derived from the earlier Thumper and probably had something to do with "Robert" and "rabbit" sounding a like after a night at the pub)
CAT (yes, all caps, it's more an acronym than a name... given to me by an "old gang" of friends...stands for Crazed And Treacherous... this one spawned a few others "Don Gato", "the Catman", Cuz'n Cat, etc)
Rub M'Bum (Lyskhala is sort of responsible for this one... long story about what happens if you don't sign your name legibly when attending meetings)
"Da Beaner" (My brother in law hit me with this one... when we first met, he was under the impression that I was Mexican and blahblahblah)
"F--king Dracula" (Father in law... long story! :BG
Dag Nabbit (My gameshow host alter ego... Welcome to another exciting episode of Save That Puppy! I'm your host Daaaaaaaag NABBIT!... lys is sort of responsible for this one, too)
Like I said, the list goes on and on... those are some of the more interesting ones, though.