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A dog that physically looks like an adult dog but in behavior and knowledge of the world is still a puppy.
I still have hopes that my duppy will grow up to be a beautiful smart German Shepherd.
duppy by SloTwitch September 7, 2009
an adjective which can be placed in front of any word and used to describe anything at all. can be interpreted as a good description of something and interpreted postively or negatively.
Jane: Wow Pete, that shirt is sooo duppy!
Pete: Uh, does that mean you like it or...?
Jane: It can mean whatever you want it to mean!
Pete: So it's a cool shirt, then?
Jane: Well, to you its duppy, to me its duppy, and its all a different kind of duppy.
Pete: Uhh, ok then. Duppy!
duppy by b3c October 6, 2005
Also a three-piece electro art-pop band from Deptford, SE London, UK.
Hey, who are Duppy?

Duppy are a three-piece electro art-pop band from Deptford, SE London, UK.

Thanks for the informative answer!
Duppy by Darranps January 20, 2009
Jake: Hey Becki wanna Duppy!??

Becki: Erm no erm yes erm wait i'm confused

Oli: Hey Becki wanna Duppy!?

Becki: What does Duppy mean??

Boys: Sex!

___________________

Joe: Saw that girl from the gig last night

Ben: Yeah and...

Joe: i Duppied her goood

Ben: No way you gave her some N-Dubbin

Joe: I Duppied every hole mate!
Duppy by Whitewood July 20, 2009
The word duppy can be used to describe a person, usually a young man who acts without confidence, and is generally uninteresting, but still attempts to be. It can also be used to describe an object or idea that is stupid. Duppy is generally a negative term, used when describing an uncharismatic person.
Guy 1: Hey bro! Do you like memes? I really like them! Sicko Mode! Mo Bamba! I have airpods! So anyway do you want to have a hang sesh this weekend?

Guy 2: Never speak to me again, youre acting duppy.
Duppy by Skwimbar January 16, 2019
Duppy, a name that strikes "pussy" in your mind while running from a brain skywars player.
Look over there! theres a duppy probably a trash tryhard.
Duppy by prse October 14, 2020