dob in

verb

1. tr to inform against or report, esp to the police
2. to contribute to a fund for a specific purpose

Example Sentences

Frustrated councils are left to put up signs begging people not to vandalise trees and to dob in their neighbours.

From BBC

The police phone line for nonemergencies has been overwhelmed with people calling to “dob in,” as we say here, reporting others they think are breaching the rules.

From Washington Post

Researchers in Canada asked 2,000 people in the US if they had come across workplace vigilantes, meaning those who took it upon themselves to dob in their colleagues for breaches of company policy, or what they deemed to be egregious moral violations.

From The Guardian

He said the Waste Watch website allowed members of the public to dob in further examples of so-called waste for him to investigate.

From The Guardian

He previously was imprisoned for several months in Dob in 1988 and 1989 when he was convicted for allegedly disclosing military secrets.

From Washington Times