Similar to rickrolled internet fad, gagarolled is the act of following a link which you believe to be a subject of interest for you but instead links you to a video of Lady Gaga.
Crap! I got gagarolled again! Thats the thirdtime this week!
Similar to the notorius Weeaboo, a Gagaboo is one who is obsessed with the horror that is Lady Gaga, and are brainwashed by her bullshit. However, instead of speaking wapanese, they constantly speak in the "future tense" and believe they are better than most regular, sane people. Don't bother argueing with them. They're not wrong, they're born that way.