If you wriggle or wriggle part of your body, you twist and turn with quick movements, for example because you are uncomfortable. The babies are wriggling on their tummies She pulled off her shoes and stockings and wriggled her toes
If you wriggle somewhere, for example through a small gap, you move there by twisting and turning your body. He clutched the child tightly as she again tried to wriggle free Bauman wriggled into the damp coverall. a movement in which you twist your body from side to side
to move in a twisting or contorted motion, (especially when struggling); "The prisoner writhed in discomfort"; "The child tried to wriggle free from his aunt's embrace"