scriggle

To scriggle is to wriggle, squirm or twist in that restless, can't-keep-still way — the physical vocabulary of a toddler at a long dinner or anyone who can't settle. As a noun, a scriggle is the wriggling motion itself. The UK dialect word also carries a rare secondary meaning of scribbling or jotting, though it's the squirmy sense that gives it the most life. There's something onomatopoeic about it: saying scriggle almost forces your mouth into the same contorted motion.