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informal One who tends to be fussy or particular, usually to an excessive or unnecessary degree. Primarily heard in US. Don't be such a fussbudget, huh? This really isn't a big deal. Of course Vanessa found some miniscule issue that no one else would have noticed. She's such a fussbudget.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.