Oscar category?

• Bert or Ernie
• Kermit or Oscar
• Oscar the Grouch, for one
• Weak person (informal)
• Kermit or Fozzie
• Kermit or Miss Piggy
• Fool playing up-tempo endlessly
• Kermit or Ernie, for example

Wiktionary Word definitions in Wiktionary
n. (context UK Australian NZ slang pejorative English) An incompetent or foolish person.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
Trademark (U.S.) Sept. 26, 1972, claiming use from 1971, but in print from Sept. 1970. Name coined by creator Jim Henson (1936-1990), who said, despite the resemblance to marionette and puppet (they have qualities of both), it has no etymology; he just ...