[Citation needed]

[LeadMagnet]

Wikipedia disbelief breaks out into the real world.

citationneeded slideshow on Flickr

[zumojuice]

I hate to point out that 'citation needed' is not a wiki invention...

[LeadMagnet]

I hate to point out that 'citation needed' is not a wiki invention...[citation needed]

But seriously though, it IS from wikipedia. In common culture/slang, it's an expression of disbelief of a statement, which people use as a joke BECAUSE of wikipedia. As a statement, wikipedia never created anything but the word 'wikipedia'.

[zumojuice]

Well that might be what it has become, but it's traditionally to alert that a book/reference is required.