Definition of duck soup in US English:

duck soup


North American
  • An easy task, or someone easy to overcome.

    ‘we had some great battles, but against me he was duck soup’
    simple, not difficult, straightforward, clear, accessible, direct, undemanding, unexacting, unchallenging, unsophisticated, trouble-free, painless, effortless, easy, facile, elementary, idiot-proof, plain sailing, a five-finger exercise, nothing
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duck soup

/ˌdək ˈsup//ˌdək ˈso͞op/