Having a wiggly, winding, or twisting shape with lots of curves and bends rather than being straight.
From 'squiggle,' possibly related to 'squirm' or 'wiggle,' combined with the -y suffix. The word is relatively modern, appearing in the early 1900s.
Squiggly handwriting is actually a sign of intelligence and fast thinking—when people's brains are moving quickly, their hands can't keep up, so their writing becomes more chaotic and less controlled.
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