The children's book "Still More Stories From Grandma's Attic" by Arleta Richardson features the word, "Slop-tot''.
It means, a child prone to sloppiness.
And, it's an actually spirit-lifting word of self-deprecation when it hurts to call yourself stupid:
POV: you're in the kitchen doing dishes, and you knock over the soap dispenser; soap all over the kitchen towel and stained cabinets. You're so mad! Then, you say to yourself, "I'm being a slop-tot; stop being a slop-tot.'' While you're banging things around, "Slop-tot-Slop-tot-Slop-tot" rounds through your head; you're surprised to find yourself fighting not to smile. Then you smile. Slop-tot is irresistible.
(Slop-tot may nowadays have a different meaning than it did in the time period of the book, though I've not found any evidence of such in my cursory internet search :)