duck soup按字面理解是“鸭汤”，实际是用来指：容易处理的问题；容易打败的对手 

【例句】
My new boss Pikachu is duck soup, but his wife is difficult to handle. 
我的新老板皮卡丘是个好胡弄的人，但他的妻子却很难对付。

Winning this game is going to be duck soup. 
赢得这场比赛是轻而易举的事。