I have, twice that I can remember.
- Nukamajig - microwave. I still use it from time to time because it’s too stupid not to.
- Miscombobulate - mixup and confuse. Just now, between the time it was and when the appartment building’s laundry room was closed for the night.
I don’t intentionally make them up, it’s just what comes to me as my brain frantically tries to figure out the right word. Like “fish museum.”
They caught all the fish and put 'em in a fish museum
And charge the people twenty-five bucks just to see 'em