1. To extricate oneself from a snug thing or place by or as by twisting and contorting one's body in order to maneuver out of it. I thought I was completely stuck in the crawlspace, but I was finally able to wiggle out. The jeans were so tight that I had to wiggle out of them.

2. To avoid or disentangle oneself from some situation, task, duty, or responsibility, especially through sly, devious, or cunning means. He always tries to wiggle out of doing the dishes each night, claiming he has some project or another he has to work on for school. Sally always finds some way to wiggle out of any trouble she gets herself into. I told you two weeks ago that the whole company has to be there to do the stock count—you're not wiggling out of it this time!