Thanks to the BBC I finally know why one of the performers with the well known popular beat combo U2 [Never heard of them: Ed] has his colourful soubriquet. He's called "The Edge" because he keeps falling off them.
Perhaps he should be renamed "The clumsy oaf" or "The bruise".
Actually I used to have a U2 album, "The Joshua Tree". It was not in my possession for very long. 'Nuff said.