Let's call him Kylie just to piss off that guy who keeps bitching about "Stevie" Johnson not being called Steve.
Or...
K-Dub
Great White (as in Great White Shark, or Great White Hope)
Moby (as in Moby Dick, not the singer)
K-Bomb (cuz he blows up the O-line)
Buff Daddy (as in Buff...alo)
Big Buff
Lumberjack (no idea why, I can just imagine him being one)
Mr Freeze
Personally I like K-Bomb and Buff Daddy.