What does "muppet" mean?

Alternative form of Muppet (“a puppet in the style of Jim Henson's Muppets”).

Muppet

//ˈmʌpɪt// noun, slang

noun, slang ·Moderate ·College level

Noun

1
Alternative form of Muppet (“a puppet in the style of Jim Henson's Muppets”). alt-of, alternative
2
A term of endearment, used with a young girl countable, uncountable
""Mamma, I see Mr. Joshua Parker coming up the road in his gray hat with the black band," announced the daughter emphatically, craning her neck to see over the evergreens. “Do you, Muppet? Then he is coming to call at the rectory; for he never wears his hat except when he is going to make a call, — and there is nowhere to call at but here.""
3
A type of puppet created by Jim Henson or his studio, typically operated with one hand of the puppeteer inside the head and a rod or glove to move one arm of the puppet.
4
An incompetent or foolish person. Commonwealth, Ireland, UK, derogatory, slang
"Sally is such a muppet, the way she always misses the train."
5
One of a group of established puppet characters acting as a sort of repertory company on The Muppet Show, and/or appearing on Sesame Street.

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6
Alternative form of muppet (fool). Australia, Canada, Eastern, Ireland, New-Zealand, South-Africa, UK, US, alt-of, alternative, derogatory, slang
"'I'll come, if you like,' Paul says. 'I'm not asking you, Muppet,' Kit snaps."