The phrase "killer cop" refers to a police officer who has caused the death of another person, usually in the line of duty, either intentionally or unintentionally. Full definition
Convicted killer cop Peter Liang and the city have been slapped with a $ 200,000 lawsuit by the girlfriend of slain Akai Gurley over his 2014 shooting. (nypost.com)
As of Monday evening, about 1,300 people had signed up to participate in the protest, which aims to «jail killer cops» and «fire Bill Bratton,» according to Facebook. (dnainfo.com)
Rather than come up with the sorts of offhand, unexpected weirdness that generally constitutes the best gallows humor, they lean on the worst, laziest tropes: Boring racial stereotypes, disgusting fat people who won't stop eating, sex - crazed men in gimp suits, nymphomaniac killer cop ladies, and on. (kotaku.com)