We have two little boys, H-Man and C-Monster. Collectively, they are affectionately known as the Scheisensplatts (We hope they never learn German!)
A podcaster I listen to has “Punkalicious” and “Captain Evil”, and I think Adam Savage has “Thing One” and “Thing Two”.
What shorthand names do you have for your kids?
We seem to have had an insect theme going, although not on purpose: Katie-did, Sarah-bee, and Bug. When they were little, there was always the traditional Sissy and Bubba (Southern for Sister and Brother).
Growing up, my brothers and I were Marcus Aurelius, Giggly Gertie, and Fat Bob.
My kids are Jaimito and Destructo-Boy. The oldest one doesn’t really have a nickname.
They’re not twins, but we used to call our boys Fred and George - indiscriminately, thank goodness. They’d argue about which one was which. Then Rowling put a damper on that little game.
from oldest to youngest Scooter Buggy( my daughter pregnant daughter at that)and Shorty(kind of an ironic nickname since he is the tallest of everyone in the house)and finally the 7 week old growing in my daughter The Peanut.
The son’s nickname is “Jr.”
The daughter’s nickname is “Sparky.”
I have no idea why.
My kid won’t let me call him anything but his real name or sweetheart.
Me: “Let’s go, honey”
Him: “I’m not honey, I’m sweetheart!!”
Me: “Come here punkin’”
Him: {indignant}“My NAME is FIRSTNAME. Firstname Sweetheart!”
(He’s 5)
Mister when talking with family/friends “Mister there has swimming lessons on Saturday.” or “I’ll come out once I put Mister to bed.”
Velociraptor otherwise (came up when he was a toddler… you have to contain him and if he gets loose… chaos!)
We started calling our daughter Boo when she was just a few weeks old, and I have no idea how we started. We still refer to her as Boo or The Boo more often than we refer to her by name.
My daughter’s name is Annabel.
When she needs changing, she’s Stinkabel.
When she’s in a bad mood, she’s Horrorbel.
When my friends ask after her they call her Bel, Bely, The Belly or Belly Monster.
When I write about her, she’s just A.
When I’m talking to her, she’s Poss or Miss Possum.
Her unborn sibling is Speck (her own pre-birth nickname was Neep until I found out she was a girl, and that’s when I started calling her the Belly Monster).
First daughter was always my Bunny when she was little. Now she’s 19.
Oldest son was extremely active, agile and silly, so he was Tigger. Now he’s 18.
My next daughter was Pooh Bear, because she was just so. gosh. darn. cute until she blossomed at about age 14. Now she’s 16, but I can still get away with Kerrkidname Bear every once in a while.
And the last boy was strong and always climbing things, and so he was Monkey. Still is, but he’s 10, so I think those days are waning.
I am sad now. Enjoy your kids’ nickname days. They don’t last long. 
I have Larz and Belz. And they have Momz.
Tall One and Queer Bait. The third one has a nickname, but it’s really just a perfectly normal first name that isn’t hers.
Our 4 1/2yro, Jett, is Boy 1, Jett-Jett, Jetster, Jetski, Jet Plane, Turbo, and Captain Destructo.
Our 13mo old, Trent, is Boy 2, T-Rent, Lil T, T-Bill, The Rent, and Rental Unit.
Both boys are also temporarily nicknamed according to their moods…usually it’s a variation of “_______ Mc_____alot <or_______Pants> is _______.” As in–“Whiney McWhinesalot is whiney.” Or, “Grumpy McGrumpypants is grumpy.”
Kate is KateKate (no idea why) or Kitty Kate.
Will is Little Man.
Collectively, they’re The Munchkins.
That’s what my husband calls our daughter as a nickname. I call her the bird or Serenabird because she sounded like a baby robin to me when she was born.
Our daughter was usually just a variation on her given name, but sometimes Choppie (from an original “Chipmunk Cheeks” comment via my wife’s finely-honed nickname mutation skills) or The Dwarf.
I don’t have kids, but I have a lot of nicknames. Kookers (the “koo” rhymes with “boo”), Kooks, Kaitie-Kookoo, Poopers, Poops (those have pretty much fallen by the wayside), Geraldine Sardine, George (that one was for me and my brother) and then the myriad weird names my mom has come up with that seem to be just random combinations of syllables. My brother is known as “Buhzh” (that’s the closest orthographical approximation I can make) to almost all of his friends and our family (this post had a lot of parenthetical notations).
Baby From Mars (initials G B) is variously G, Bee, Rabbit, Rabbity Cat, Pinkypoo, Poodle and Monkey. She’s also Lady G and The Bee on my blog. I need to get out more.
PandaKid = Squirt