a relatively new meme, spawned from Never Mind the Buzzcocks Series 23 Episode 12. The presenter, David Tennant (off of Doctor Who) would, after reading out an innuendo-based joke, would say "BARROWMAN!" (implying blamehood upon John Barrowman) and brandish his fist at the screen.
The meme now just represents blaming any problem you happen to have at the time on John Barrowman.
McFly's song contained the lyrics "there's nothing on Earth that could save us since I fell in love with Uranus. Which as it happens was a line removed from the pilot episode of Torchwood"
BARROWMAN! *shakes fist* *grrrrr*