the roaring forties
noun/ðə ˌrɔːrɪŋ ˈfɔːtiz/
/ðə ˌrɔːrɪŋ ˈfɔːrtiz/
[plural]- an area of rough ocean between latitudes 40° and 50° south
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the roaring forties
Definition of the roaring forties noun from the Oxford Advanced Learner's Dictionary