Dup 

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

He was a dup
What a Dup! oh my god

Dup Dup Dup Dup

Dup by burgerflarg May 1, 2010

Dup 

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.

You're gonna get DUPPED!

Dup by JoyfulPundai April 24, 2010

dup 

The word used when you first meet a person.

1st person: dup??
2nd person: dup!!

dup by ashs June 7, 2009

DUP 

democratic unionist party. Ian paisely is the leader. Ian hates gerry adams who is the leader of sinn fein. everbody hates them lol

dup to win the election!

DUP by gilly_gers October 2, 2005

dup 

combination of "duh" and "yup"

dup!!

dup by ssssssssa August 5, 2010

dup 

When one proceeds to obtain a strike in bowling.

Yeeeehawwwww I GOT DUP!!!!

dup by gankzta July 11, 2003

Dup 

To be in a relaxed environment whilst under the affects of alcohol, cannabis, or other depressants

Hey what shall we do tonight

Let's just dup for a while

Dup by terreeeeey January 21, 2015