noun

• (countable) A menial yet self-important person; a person who makes empty boasts.
  "I remark that everyone (with the exception of such Cockalorums as the Guard, who rather stands on the dignity of his uniform, I imagine) understands the Captain's English, while they don't seem to get on very well with my French."
• (uncountable) Boastful speech, crowing.
  "'Sounding grander is not always better,' answered the cobber. 'Did you never hear tell of High Cockalorum?' / 'High Cockalorum! What's that?' / 'It's what they call high footling speech, or a self-important man who likes to call everything by fancy names,' said his master. 'And as I heard it, it didn't do the man in the tale any good at all.'"
• (uncountable) A game similar to leapfrog.
  "We played cockalorum from one side of the street to the other."