inform against (one)(redirected from informed against somebody)
inform against (one)
To share or reveal compromising or incriminating information about one, especially to the police or other figures of authority. If you inform against him to the cops, he'll definitely send some of his goons out after you. Yeah, I know about your shady deals, but I didn't inform against you, I swear!
See also: inform
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.