adjective, wig·gli·er, wig·gli·est. wiggling: a wiggly child. undulating; wavy: a wiggly line.

What is wriggly mean?

making jerky or restless movements. after a while, the little girl got wriggly and had to be taken outside to the church vestibule.

Is it get a wriggle or wiggle on?

This expression is used when you want to tell someone (quite forcefully) to do something faster. In the UK get a wriggle on is more common. In the US get a wiggle on is used more.