squirm in(to something)
to press into something that is tight; to crawl or wiggle into something tight. (For people, this is often clothing that is too tight. For other creatures, it is more variable.) Dave squirmed into his jeans and pledged to himself that he would lose some weight. He squirmed in and knew he could never close the zipper.
squirm out
(of something) 1. Lit. to crawl or wiggle out of something. The worm squirmed out of its hole and was gobbled up by a bird. The worm squirmed out.
2. Fig. to escape doing something; to escape the responsibility for having done something. He agreed to go but squirmed out at the last minute. You did it and you can't squirm out of it by denying it!
squirm with something
to fidget or move around restlessly, showing irritation of some type. The children squirmed with impatience, but they kept quiet. I squirmed with discomfort, hoping that the time on the aircraft would pass rapidly.