feel someone's collar
feel (one's) collar
To arrest one (as if by first grabbing them by their collar). The police will feel your collar soon enough if you keep breaking the law.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
feel someone's collararrest or legally apprehend someone.
The image here is of using a person's collar as a means of getting a secure grip on them.
Farlex Partner Idioms Dictionary © Farlex 2017