Suggestions for mean dog names might be, Killer, Boss, Sarge, Brutus, Hank, Tank, Brick, Shredder, Bruiser, Chief, Pharaoh, Napoleon, Chomper, and Spike.
I love giving lovable dogs mean names! There are lots of websites that offer suggestions but I've heard quite a few mean names on little dogs and my favorite are spike, killer, kujo, dark lord, vader, tank and satan!
Name your dog after famous characters such as Rocky or Pacino; or after Harley or Mac trucks. I have seen dogs with the names of favorite football players.
Some good "mean" dog names are: Ace, Bandit, Rascal, King, Boss, Brooklyn, Brutus, Meaty, Menace, Bully, Baxter, Buster, Butch, Gage, Grunt, and Tyson are some really good names for the "tough puppies".