"One of Bono's early nicknames was Bon Smelly Arse. I was glad that didn't stick. I don't know if the band would have got very far with a singer called Bon Smelly Arse."
The name Achtung Baby was chosen so that their new album could not be taken seriously because on their last album Rattle and Hum, they were critically attacked. Achtung means attention is German: "Attention, Baby," is the literal translation.