squiggle

noun

1. a short curved or wavy line; curlicue
2. an illegible or meaningless scribble or scrawl

Origin: squ(irm) + (w)iggle

transitive verb squiggled, squiggling

1. to form into squiggles
2. to write as a squiggle or scrawl

intransitive verb

1. to make squiggles
2. to move with a squirming motion; wriggle