Someone who jokes around a lot. Someone who tends to act a fool, yet in a humorous way. Everyone loves them a good ol' Duffa!

And there is also "Duffery", which is the proper word to describe the actions a Duffa takes!!
Sam: so, I bit my cat the other day.

Ryan: you silly Duffa.

Sam: I was just bored, bro.

Ryan: what's with all this duffery?!
by Cay Breezyy's January 15, 2012
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A boy who hits puberty way to young, and resembles a grown man by the seventh grade, who wears a taped pair of glasses and trips on him self often.
Hey you see that duffas over there trying to pick up on that chick, I bet he'll lose his balence in five seconds, lol!
by joe May 19, 2004
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A more derogatory term of the word, doofus.

One who is stupid beyond all belief.
It was Jordan's 21st the other day and she was being such a duffas.
by Magic show November 28, 2010
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Racist term for the Irish.
Later turned into an old fashioned insult usually prefaced with "silly"
me: I was over in Ireland, too many duffas there. That's the problem
Irish man: *Hits me with beer bottle*
by the cum August 21, 2021
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Duffa
Ufuckinmoron
Forfuckssake
Fuck off
Asshole
by Fango69 July 9, 2019
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