An old, boring, no humor, crabby, no imagination, anal-retentive person.
"Quit being such an old fuddy duddy, lighten up some!!"
by Joy September 11, 2004
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Old fashioned and really out of touch person.

A great example is the famous host of the popular late night radio show Coast to Coast am and lover of scorching hot pizza rolls, George Noory
Usually people like this have old out of date ideas and are extreme prudes that are scared of nudes.
Guest: I'm so pissed
George Noory: now now you can't use such abrasive language on a show that airs at midnight!
Guest after the show: Damn you know that guy got mad about me saying pissed off? What a fuddy-duddy!
by CarnivoraPlant April 15, 2020
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an adjective used to describe a person that is being a downer, lame, boring.
Katie was such a fuddy-duddy last night at the party.
by kaytee-sue March 24, 2008
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Any person who would actually use the word "fuddy duddy" in a sentence.
OLD MAN: I am such an old fuddy duddy. (The usage of the word indicates that his self-observation is correct)
by Knelt April 23, 2006
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A person who reacts negatively when he learns that unmarried persons are engaging in sexual intercourse. Typically used with "old".
Don't tell Bob you slept with me last night, he's an old Fuddy Duddy about that sort of thing and it will ruin his day.
by pamschel December 22, 2006
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