Definition of fuddy-duddy noun from the Oxford Advanced American Dictionary

 

fuddy-duddy

 noun
noun
NAmE//ˈfʌdi ˌdʌdi//
 
(pl. fuddy-duddies)(informal)
 
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a person who has old-fashioned ideas or habits You're such an old fuddy-duddy!
fuddy-duddyadjective
 
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fuddy-duddy ideas