Our previous mix had a million nick names. It got to the point I think she just recognized tone of voice more than what was actually being said. My personal favorite was "Mucho Muchachka" No idea where it came from.
Cowboy's full show name is Dr. Cowboy Malloy. He has his pink papers from Germany but a limited IP number from AKC for showing. I really just wanted a silly name for a big handsome GSD who I never planned to breed anyway, in a sea of very serious GSD names and laughed every time the judge had to read it out loud.
I also call him Fluffy Trousers, You Big Lug, Sweetboy (the parrot actually started calling him that first for some reason), Toy Loy and The Doctor.