What is the definition of a fuddy duddy in American English?

Fuddy Duddy Definition

The definition is the same in American, British and Indian English.

https://books.google.com/books?id=oguh6G2B2r4C&pg=...

Only British fuddy duddies think all popular expressions are American.

From The Economist: THE BBC, Following up on an apparently successful column, asked readers to send in their least favourite Americanisms. Mark Liberman noted that of five "Americanisms" cited in the original column's first paragraph, four were of British origin.

http://www.economist.com/blogs/johnson/2011/07/pee...

"Fuddy duddy" certainly exists in British English, and another similar expression is "old fogey". Moving on slightly you might find "(old) geezer".

All refer to people who are mentally living in the past, who cannot be bothered to keep up with the times.

There are a lot of shades of meaning in American English. See http://en.wikipedia.org/wiki/Fuddy-duddy

It can mean stick-in-the-mud, geezer, old crank, old codger, old fart, etc.

fuddy-duddy: a person who is very old-fashioned and pompous.

An old person who's no fun and is often cynical.

It's mostly used by older people though. It's not modern slang.

an old fashion, traditional person that won't keep up with the times

a fussy, critical person

an old-fashioned person