IPA: /ˈwɪɡlə/
KK: /ˈwɪɡlər/
A person or thing that moves in a wiggling manner, often referring to a worm or a restless child.
The child was a real wiggler during story time, unable to sit still for long.
Wiggler → The word is formed from "wiggle" (of uncertain origin, possibly imitative of the movement) and the suffix "-er" (meaning a person who). A wiggler is a person or thing that wiggles or moves in a wiggly manner.
Think of someone or something that 'wiggles' — the '-er' indicates a person or thing that performs that action.