From "Justice League: Only a Dream (#2.5)"
[speaking of Dee
] Look, whatever he is, he's sure not in the same league as Grundy and the others. He's a nobody.
Ever read "The Odyssey"? After Odysseus was caught by the cyclops, he told it his name was "Nobody." So when he poked its eye out and its friends asked who did it, all the cyclops could say was, "nobody."