plural noun Informal.
a propensity to steal.
Origin of sticky fingers
First recorded in 1930–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
A propensity to steal, as in You'd better not leave any cash around; she's known for her sticky fingers. This metaphor makes it seem as if valuables adhere naturally to a thief's fingers. [Colloquial; late 1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.