Derivation from the word whadup, as in what's up/wassup. Quite handy when chattin.

Australian slang for the Downwards Uber Punch. Shortened to DUP, or dup, it is a type of punch achieved by balling up your fist and swinging your arm downwards onto a victims head or body part, keeping your elbow bent and snapping your wrist down as your fist connects with flesh.

Democratic Unionist Party.
Beguiled bunch of no good squatters, whom if it were not for the sympathy of England, they would be getting their arses kicked every day.

Encompasses all that matters in the world. A social group that is the epitomy of what everyone else would like to be.

1. Stupid, confused MMORPG players. I.e. Someone who says or does something stupid could be expressed as a "Dup"

2. Synonym of the 4chan term derp

1)You yell d-up when you are on the block and only when you are the 1st to see the cops. You say d-up just to let everyone around you kno they are there.2) You can also call the cops D-Up too. Depending the situation could mean, "RUN"

Dup - 1. An ambiguous term, used to filled the void when one cannot think of the proper word to use. 2. A profanity, see "fuck". 3. sup* 4. Can also be used in the good sense of the word, meaning "GOOD".

Originally coined by a faggot on MSN, and then put into widespread use by 3 faggots on xbox live.