A waggle is similar to a wiggle. It is a little side-to-side or wobbling motion of something, like perhaps a finger. Here's a sentence:
She motioned for quiet with the waggle of her index...
it depends on which context
it is a childrens television series consisting of 4 people, teaching children.
it is also a sudden spazmalic outburst of nerves tingling throughout the body, you get...