themusecalliope

(I'm sure that most of you folks know the first definition (below), but I've included it in the interest of completeness.)

And now, a spot of education.

"Rickrolling is a prank and Internet meme involving the music video for the 1987 Rick Astley song "Never Gonna Give You Up" ... The meme is a classic bait and switch: a person provides a link they claim is relevant to the topic at hand, but the link actually takes the user to the Astley video. The URL can be masked or obfuscated in some manner so that the user cannot determine the true source of the link without clicking (and thus satisfying their curiosity). By extension, it can also mean playing the song loudly in public in order to be disruptive. A person who falls for the prank is said to have been "Rickrolled"." - Rickroll Wikipedia Article

Random Access Brain is the sort of brain that will randomly pop ideas into your head when you are busy doing something else. It will remind you of that time in kindergarten that you were learning the letter A, and do this for no apparent reason. It will take unrelated concepts and create new ideas out of them. Sometimes it will do this in the most inappropriate of circumstances. Worse yet, sometimes the ideas are funny.

Random Access Brain on Shuffle is when the RAB decided to start playing music. Generally it is something completely unexpected like the Gilligan's Island theme or just the chorus of your favorite song from third grade.

You could be sitting at work, minding your own business, trying to remember that new band name you came up with the other day...that you forgot to write down. (Was it something to do with donuts?) And just when you think that you've got it, your RABoS starts playing "Never Gonna to Give You Up."

And that's how it's possible to Rickroll yourself.