have a wild hair up one's
have a wild hair up (one's) definition
to act in a hyperactive and energetic manner. (Usually objectionable.) : She has a wild hair up her ass about something. I don't know what.
to be obsessed with some strange or offbeat idea. (Usually objectionable.) : You're acting like you've got a wild hair up your ass. Calm down.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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