lackadaisical
adj
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Lazy; slothful; indolent.
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Showing no interest, vigor, determination, or enthusiasm.
one fry short of a Happy Meal
adj
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stupid, retarded, slow
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mad, deranged, insane
How often have the words lackadaisical and one fry short of a Happy Meal occurred in a corpus of books? (source: Google Ngram Viewer )