"Racing hearts, bleeding ears", "soap on a rope", "hamaar" that's tricky cos you have to pronouce it right it's supposed to mean red in arabic (but i'm not really certain), "a man in beige", "Mouselini ate my canary", and they kind of get sillier from here
My favourite, it's imposible to write down, but basically you stick your tongue out of your mouth, and make a farting noise... heheheh... i'd love too see people try to spell it
there are also a lot of bands who get their names from film (eg black sabath, they might be giants etc...) or from song names (eg radio head), so you dont really have to make one up