Chaotic George Floyd protests have left the Big Apple splattered with graffiti.

After four nights of protests fueled by the unrest over the cop-involved killing of Floyd in Minneapolis, storefronts and squad cars have been vandalized, along with iconic sites such as St. Patrick’s Cathedral and the Manhattan Bridge.

Here are what some of those tags mean:

F12: 12 is a reference for police, though it’s unclear where it originated, according to the Salt Lake Tribune. Some believe it came from the police TV show “Adam-12” — while others speculate it’s from another program, “Barney Miller,” which was set at the 12th Precinct. F12 essentially means f–k the police.

ACAB: All cops are bastards.

BLM: Black lives matter — an activist movement as well as a slogan for protesters.

FTP: F–k the police.