Sound of Silence by Disturbed.
I have a literal physical reaction to that song, I hate it so much.
I'm tolerant of a lot of music I dont particularly like and can generally sit through songs or artists I'm not a fan of (years of being in an office with the repetitive dirge of Heart or Capital radio).... but my god, if that Disturbed song comes on (semi regularly on Absolute Radio), I have to turn it off