Wiggly (adjective)

1. Moving or wriggling with quick, small movements.
2. Difficult to control or predict.

Origin:

19th century: perhaps from wiggle + -y.

Examples:

1. The wiggly worm was a popular fishing bait.
2. The wiggly line on the monitor indicated a problem with the electrical system.
3. The baby's wiggly movements made it difficult to change his diaper.
4. The wiggly puppy was full of energy and always on the move.
5. The wiggly road made for a bumpy ride.