I don’t think I do any of these - not yet, anyway. Although I see not all of yours are “slips”, but some of them intentional nicknames (I like “Chuffnuts”).
I do have pet names for certain things. TV remote control, or remote control of anything, has for years been: “The bazzazzer”. I think my brother first christened it this, years ago, when TV-remotes were new out.
Several times in the past few days, I couldn’t remember “hyacinth”. I only needed the word at all because I’m growing one, but every time I try to remember what it’s called, I have to go through a complete list of flower names, usually homing in on: “Chrysanthemum”, but still feeling that’s not right… I just had to go through the same exercise, even to tell you, and still ended up at Chrysanthemum, but then thought: “No, no, I’m sure it’s NOT a chrysanthemum; it’s a Ha…, Hi…HYACINTH!” The only connection is they’re both Greek flower names. I even Googled the Greek myth of the youth, Hyacinth, after whom the flower is named, in hopes it would help me the next time. But no, I still struggled.
My mum, who doesn’t have MS, is famous for Spoonerisms, and also for completely subconscious but often very funny puns.
I think my favourite of her Spoonerisms is “nive doze”, for “nose dive”. She didn’t even know she’d said it, and family are so used to it, they accepted it without comment!
Of the unintentional puns, all-time classics include:
“This choux [pronounced “shoe”] pastry is like old leather”
On being offered a raffle-ticket for a rocking-horse: “Who’d want to be saddled with that thing?”
Of a model railway: “I am not watching points…”
I can’t remember any of the others right now, but there have been countless ones over the years. She’s usually unaware she’s said them, until everyone starts looking at each other and giggling. Then she asks: “What? Have I said something? What did I say?”