Wrote or drew quickly and carelessly, usually in a rough or hasty manner without much thought.
From Latin 'scribere' (to write), through Middle English and Old French. The diminutive '-ble' suggests doing something in a hurried, less careful way than proper writing.
Scribbling is what happens when writing speed overwhelms writing precision—and neuroscientists find that quick, messy handwriting actually activates different brain regions than neat writing, making 'scribbles' genuinely different from careful penmanship.
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