We seem to answer this question every other week in one thread or another, but we are such motormouths, it would be horrid to have to dig through all those posts.
The people on MTF who don't like Roddick originally called him all sorts of names (many of them obscene) and also decided that he looked like a duck..... Donald Duck in particular.... so some "wit" began calling Andy "Rodduck" which morphed into "Roduck" as well, and also simply "Duck". And because these same lovely people also decided that all of Andy's fans were also morally and mentally deficient, they started calling them "ducks" or variations of that word and even created a place on another board devoted to discussing the "cult" they labled "Duck Nation," i.e., Andy's fans who posted here.
At any rate, most of Andy's fans sort of started laughing at that and we started calling ourselves "duckies" and started making up thread titles to take advantage of the fun. Things snowballed, and I can't remember exactly what came first. We started making thread titles with Duck in them, and refering to ourselves as duckies sort of around the same time. Some people got duck avatars and dropped them and got them back again, and then more people got duck avatars.
Bottom line is that it is all silliness and fun and nothing serious at all. The duck is our mascot and our talisman and our little joke.
If you want true freakishness....... you need to search out Mister Q's tit cam, and boobie pictures.