IDIOM: a "Duck Soup"

(slang) something very easy, an east thing to do, an easily accomplished task or assignment, a cinch to succeed, as in Fixing this car is going to be duck soup. This expression gained currency as the title of a hilarious popular movie by the Marx Brothers (1933). The original allusion has been lost [Early 1900s]. Beware with the use of the idiomatic expression, a according to "Urban Dictionary" it can also convey a number of obscene and unpleasant meanings : 1. Duck Soup is a gathering of sad and single people on a Sunday night making one last ditch effort to 'get lucky' at the weekend. Duck Soup is often frequented by lonely cougars, and fag hags but never a hottie (unless they are there to make sport of all the losers). This phrase was coined after the 1933 movie of the same title, directed by Leo McCarey, written by Bert Kalmar and Harry Ruby and starring the Marx brothers. A gathering of Duck Soup is aptly named, because Groucho Marx described Duck Soup... '"Take two turkeys, one goose, four cabbages, but no duck, and mix them together.' In other words, all the left over or inferior crap thrown in together, but nothing exotic or tasty. thus we are in human terms left with overweight, balding, sweaty men and women, none of whom are attractive, all trying to score each other. Jeffy; Damn Jo, look at all of these sad lonely people here at the house of Ales, whats going on? Jo: Its Sunday night Jeffy, they are Duck Soup! Unfortunately, not everything is possible in the world of English etymology, and a search for the origins of "duck soup" soon runs aground on a simple lack of evidence. According to The Random House Historical Dictionary of American Slang, the phrase "duck soup" first appeared in a newspaper cartoon drawn by T.A. Dorgan in 1902, and showed up again in a work by someone named H.C. Fisher in 1908. Not only is the precise origin of "duck soup" unclear, but I'm afraid that the original logic of the phrase remains obscure as well. Is "duck soup" easy because ducks are easy to shoot (as in "sitting duck"), or because ducks are very greasy and thus easily rendered into soup? Or is the phrase a play on the fact that any spot of water with a resident duck is already "duck soup"? Your guess is as good as mine. The classic 1933 Marx Brothers film "Duck Soup" begins with a shot of ducks paddling around in a soup cauldron.