worm out of
Elicit or make one's way by artful or devious means. For example, He tried to worm the answer out of her, or She can't worm out of this situation. This expression alludes to the sinuous passage of a worm. [Early 1700s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.