Plural of dilly; multiple silly people, or things that are either remarkably good or foolishly bad.
Simple plural form of 'dilly,' the American slang term that gained popularity in the 1920s. It maintains the base word's dual meaning of excellence or silliness.
In the 1920s-30s, calling something 'a dilly' meant it was fantastic, but the same word could also mean a silly mistake—early American slang was wonderfully contradictory!
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