The present participle of 'diddle'; currently cheating or wasting time, or as an adjective meaning trivial or unimportant.
From 'diddle' with the present participle suffix '-ing,' which creates both the continuous verb form and adjectival meanings of 'ongoing' or 'characteristic.'
The phrase 'stop diddling around' shows how -ing forms create a compressed meaning—it's not just 'doing diddles' but a whole attitude of frivolous, aimless behavior packed into one word!
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