Fezzik the cat is called :
Fez
Fezzikus Demonicus
Fezzie-boo
Fez Meister
Old Fezzie-weg
Shithead (Aliens reference, honest)
Mr. Greedy-guts or Greedy-paws
Fuzz Monster
Boo or Boo-boo-kitty (family nickname for cats)
El Gato Diablo
Galadriel the Rottie:
Gal
Gal-dog
Fat-dog (she is very large, but not really super fat, just big)
Fart-dog (she has serious gas issues)
Stinky Dog
Ishtar is a French-speaking cat, so she also responds to Pupuce, Princesse, Papoune, Tresor, as well as her name, whatever: it’s all about the tone of voice. My son calls her Isshi (sounds a bit like “ici”) You can tell that he picked her original name by the nickname he uses.
My dog Casey, who is a poodle and older than the youngest Jonas Brother, is frequently referred to as Bunnyman and Bunnyboo.
I don’t know why.
Gray shorthair female cat. Real name:Char
Nicknames:
Mega Poop
Shitty Discharge
Queefy Beefey
Poopy Dick
Tardo Lardo
When I was growing up, many cats came and went over the years, but the mainstay was Pokie, who lived to be 18. After he got to be 12 or 13, I started calling him “Pops,” and the name stuck.
Our budgies Oliver, Clara and Alias are known collectively as the Keet Krewe, the Sweetkeets, the Consortium, The Chillybeepers Three, or the MilletHeads.
Clara and Oliver are a further entity variously referred to as The Glam Couple or The Heteros.
*She’s *also known as Clarita La Blanca, Miss Pink Eyes or Prettygirl while Oliver rejoices in the titles of Parakeet Prime, Number One, Big Bird, Handsome, and Senor Mr. Oliver Sir.
Alias gets called all sorts of nicknames mainly by me: Birdy-Boo mostly but also Keety-Boy, Budj-Boy, Poojy-Poo, Cutey-Boo, Li’l Alien, Li’l Pervert and Li’l Sunshine Face.
Now ain’t that the most disgustingly mooshy thing you ever heard? And us supposed to be a couple of hardboiled lowlife street types and all, too.
Our two feline overlords are known as “Sharks.”
As in, “The Sharks are hungry…” “The Sharks are circling…” “The Sharks are playful…”
Individually they are referred to as “Awful Pet.”
“Look at our Awful Pet. Why is he chewing on my shoelaces?”
It is generally assumed that they are always Awful Pets. Which is part of their charm. Sometimes we break down and admit that they are Awful Yet Adorable.
Their actual names are Parker and Casey. They only hear these names when they are truly doing something terrible.
Which is often.
My dog Princess, who has been called “Princess Wiggles” in the past—I didn’t have anything to do with naming her: I often to call her “Wigs” or “Miss Puppy.”
Large ginger tom Murray: “Murman” or “smarmy bastard”.
Tortie Eleanor: “Smellynore” or usually just “Smelly”.
Siamesish Sophie: “Snowpea” or just “Snopes”.
Tortie Anastasia: “your cat” or “her cat”, depending on whether or not I’m talking directly to my girlfriend. Because Anastasia is a psychotic bitch that hates the world and everyone in it, including me. She is her cat.
The Penny-dog doesn’t really have any, aside from the usually “schmoopy” ones you’d say to any dog. Penny-dog, to distinguish her from the humans we know named Penny, is about as close as it gets.
Binkley, however…
Odie
Satchel (and whatever Bucky Katt’s insult o’the day is in Get Fuzzy - fuzz-butt, etc.)
Peter Griffin (Family Guy)
The Happy Morom
A few other non-PC versions of “stupid”
Nice dog. Not so bright.
Oh, he has a name. He’s just not telling you.
Cats:
Molly is Mollywollypuddin’pie. Miss Priss. Precious (she really is the sweetest kitty.)
Punky is Punky-hunk, His Lardship, Couch Potato Kitty, Handsome.
Rio is Wee-kitty. Sorry. He got stuck with that when he was, well, a wee kitty. He SO isn’t wee anymore…
Dog:
Jasmine is Jazzy, Jazzbot, Darlin’ Dog.
Ladybug (RIP) was Bug, Miss B, Best Dog Ever.
Bird:
Sunshine is Birdy-Butt, Best Bird Ever, Fluffy-butt, Tweetheart, You Mean Little Bitch.
Ariel is often called Stinky or SmellyPants or Poo-head, because for a teensy runty cat, she sure can stink up a litterbox. There are days when her turds could qualify as weapons of mass destruction. She’s also called GrumpMaster or GrumpyPants, because she’s a rather unfriendly cat and prefers to glare at us resentfully unless we’re feeding her.
Morgan is usually Spanky, because she really really enjoys getting smacked on the bum. She also gets called Fuzz Butt and SillyPants, for no particular reason at all.
Why yes, my cats ARE strange… why do you ask? 
Not my cat, but one of my parents’: her name is Hermione, but she gets called Herwhiny, Hermoany, Zeppy (short for Zeppelin), Blimpers, and Chunkbutt. The other one gets called MYA NICOLE [LAST NAME]!! and Pees-a-lot. I don’t think I need to explain.
It’s good to see other people posting their cutsey names. My kitty Raven is never called by her name. It’s usually Pootz, Poofalie, Izzapootz, pootzycat, and Poopycat right after she uses the litterbox. (Sorry if this makes you want to throw up.)
Real name: William Shakspeare (Scottish Terrier)
What we call him in order of popularity: Stinky Fart Dog, Black Rat of the Sewer, Poopy Pooperton, Vicous Guard Dog (he’s not)
He’s old, farts a lot, and is scared of loud noises because his hearing is going. I love the smelly little rat.
'Ol Fuckface is a classic.
We have 3 dogs, but only Sofia the mutt (probably a Pekingese/herding dog mix!) has developed multiple nicknames:
Soflea (pronounced So-flee-uh)
Dr. Sofia Puppia
Dr. Flea (also pronounced flee-uh)
And (when she has an accident) Sofia Peea.
Dexter, the very large cat with extra toes, is often called Buddha.
Petie, a small Persian who is a “guest cat” (for 5 months so far) that we are hosting for a friend while she gets money together for her own place (the friend, not Petie) now has several names all riffing off “Petie”:
PT 109
PT Cruiser
Rob Petrie
Cosmo, the Maine Coon is also known as Cos, The Cosmonator, The Furry One and Man Cat.
Mrs. Katz the orange tabby is known as Ms. K., Ginger Minge or, more often than not just “The Minge”.
Every day when I get home from work, I stride confidently into my apartment and, in my best Antonio Banderas voice, announce to Morty, my cat, who is always right there waiting for me, …
“Hola, El Gato.”
He also seems to respond to, “Fuckhead”, “Shit-for-brains”, “You Pukey Little Bastard” and occasionally, “What The Fuck Is This Goddamned Mess?”
I’m noticing that “poop” and “stinky” seem to be common themes when it comes to pet nicknames. Go figure. 
My cats are:
Tenshi (Singapura): Kitty Guy, T-Man, Mr. T, Mighty Hunter, Mr. Guy, Handsome Boy
Ozzy (Singapura): Ozz, Ozz-man, Nutro-Burning Funny Kitten, Mr. Nosewuffle, Wuffle-boy, Mycroft, Snuggly, Fuzzy-Butt
Grace (Russian Blue): Gracie, Boo, Gracie-Boo, Graciela Aria Bella Boo, Bella Boo, Miss Boo
Sonata (Russian Blue): Fred, Frankie, Frankie-Fred, Frankie Sonata, Francesca Frederica Sonata, Miss Fred, Cloud-kitty
Clarice (Tabby): Big Fuzzy, Agent Starling, Tabby-Girl, Big-paws, Snuggly-girl
