Rickrolling is an internet meme that involves playing a trick on someone by tricking them into listening to Rick Astley singing his 1987 song, "Never Gonna Give You Up". It was first seen on 4chan and is called a "bait and switch". A "bait and switch" happens when the prankster gives a website to someone saying that the website address (which is somehow hidden) is about something else. When the victim clicks the link, they see the music video and have been "rickrolled" or "rickroll'd".