Even without the common story that it's *flutterby* anagrammed, there have been many suggestions, and a lot are at least somewhat interesting. One suggestion is that it's about the color of certain butterfly species, like the brimstone butterfly. Another suggestion says that it reflects a belief that butterflies excrete butter, as per Middle Dutch *boterschijte*, or a reflection of the belief that butterflies *eat* milk and butter like with the old German words *Botterlicker*, *Milchdieb* and *Molkendieb*. As an aside, the German term *Falter* is from Proto Germanic *fifaldo*, probably from reduplication of PIE *pel* "feel, shake", which connects it with *papilio* of Latin and *fiðrildi* of Icelandic.
Fission chips.
It's simple. Every day, it's Dublin.
He bought a new boomerang and threw away his old one.