Keith Flint, RIP, a rather odd but not a bad person. He eventually bought a pub and one of the house rules was that you had to put a pound in the 'swear jar' if you made a "firestarter" joke about him. From what I know, he was a relatively kind and well mannered guy off stage. He topped himself a few years ago.
Nothing specific, just a rather British way of saying he took his own life. Went on to the great gig in the sky. I believe he hung himself as it happens.