What is a Rick Roll?
Rickrolling, alternatively rick-rolling, is a prank and an Internet meme involving an unexpected appearance of the music video for the 1987 Rick Astley song "Never Gonna Give You Up". The meme is a type of bait and switch using a disguised hyperlink that leads to the music video. The victims, believing that they are accessing some unrelated material, are said to have been rickrolled.[wikipedia]