A former, but common and annoying, meme.
Origins and History
Yoshi was the last of the original eight to be confirmed, and was confirmed a number of months after the others. Due to this, a number of users started a joke that he was cut. A particular thread, published the day before the American release of 3DS game 'Yoshi's New Island', entitled 'Looks like tomorrow is the last day for Yoshi supporters in denial' (Referencing the fact characters are often revealed on the day their game is released) was repeatedly bumped and was still active when he was confirmed in mid-April 2014. The meme still pops up occasionally such as jokingly saying Yoshi's alternate colours were cut.
But Yoshi's old news. Now Meta Knight is cut.