quixotic

Taken from the title character in Cervantes' "Don Quixote." a. tending to take a romanticized view of life. b. tending to act on whims or impulses

Don't be so quixotic. You're going to get hurt one of these days.

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big wheel

Archaic slang. Implies that someone is so important that he is the biggest wheel on the carriage. Slightly derogatory. Also see big cheese.

"The big wheel wants you in his office right now."

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