an easy thing to do, to be very easy
małe piwo, coś bardzo prostego
"I'm having trouble getting the laptop to work." It's duck soup, mate. Just plug it in and charge." "Mam kłopot uruchomieniem laptopa." To jest banał, kolego. Wystarczy podłączyć go i naładować".
Winning your case in court should be duck soup. Wygranie tej sprawy w sądzie to banał.
For me, cooking is as easy as duck soup. Jeśli chodzi o mnie, to gotowanie dla mnie to prościzna.
easy peasy
a piece of cake
easy as falling off a log
easy as rolling off a log
easy as (apple) pie
Uwaga!
Idiom może być też użyty z "as easy as", czyli to be duck soup = to be as easy as duck soup
Fixing this fridge is going to be duck soup = Fixing this fridge is going to be as easy as duck soup. Naprawa tej lodówki to będzie małe piwo.