The phrase "crooked cops" refers to police officers who are dishonest, corrupt, or involved in illegal activities. They break the rules instead of upholding the law. Full definition
Michael Pena and Alexander Skarsgård play a pair of crooked cops who bring the pain and the laughs in the deeply disturbed buddy comedy. (cbr.com)
The story, for those unacquainted with the original, is about a seemingly crooked cop who gets in over his head and has to survive the night in a confined location, as members of the criminal underworld and his fellow cops try to catch him. (markreviewsmovies.com)
It's a race for time, as John must figure out what to do, while being actively pursued by crooked cops willing to kill anyone that threatens to uncover their misdeeds. (qwipster.net)