picture that there's this book you've read and loved. then आप go on यूट्यूब and find a vid saying the book you've read is making a movie. so you'd click the vid all excited, right? and instead of दिखा रहा है आप the trailer, it shows an old song called 'never gonna give आप up' द्वारा a dude named Rick. thats what rickrolled means.