citation 

1. The weapon of schools to attempt to defend against plagiarism by saying where things come from, thus eliminating original thought.
2. A very fast jet made by Cessna.

1. "I'm just gonna make up a few citations for the report." (Because quantity always matters over quantity anyways)
2. "Holy crap! Your grandma was drivin' faster than a Citation X!"

citation by Orion December 31, 2004

Citation 

Slow as jet made by Cessna

the Citation ISP is the only aircraft to get birdstrikes from the rear

Citation by Cuauhtemoc January 3, 2008

[citation needed] 

When you want someone to prove what they just said. Commonly seen in bad Wikipedia articles.

1: "Apparantly, the Greeks invented pudding!"

2:"citation needed"

[citation needed] by RussellLawliet December 31, 2011

citation needed 

Wikipedianese for 'bullshit'.

Jade Goody's death triggered an outpouring of grief across the United Kingdom citation needed

citation needed by Lord Grimcock February 7, 2010

Citation Needed 

A disclaimer for any time you quote something from Wikipedia as fact. Acknowledges that it isn't the world's most "reliable" source, but it's still good enough for you to use.

Drew: I heard the old Red Ranger from Mighty Morphin' Power Rangers is gay, citation needed.

Cody: Yeah, I heard that elephant populations have tripled in three years, citation needed.

Citation Needed by SIRdroosef May 22, 2009

citation needed 

One of the Wikipedia's most used phrases. Means that the wikipedian who wrote something before it, could be putting his/her own point of view or even lying.

Mourinho is going to be a manager for England national soccer team. (citation needed)

citation needed by abdullais4u January 4, 2008

citation circle 

A group of academics who exclusively cite each other and nobody else.

Rare in science, but surprisingly common in arts and humanities.

Mary's research on sexuality in Victorian times ran into a snag when she hit a citation circle and couldn't get out.

citation circle by Darth Ridley January 6, 2007