'F--k Cuomo and de Blasio' mural painted on Brooklyn street

September 20, 2020 | 5:55pm | Updated September 21, 2020 | 8:58am

Warning: Graphic content

The writing’s on the wall — er, road.

Fed-up New Yorkers painted a massive stretch of Brooklyn blacktop with the yellow message “F–k Cuomo and de Blasio” over the weekend in the vein of Hizzoner’s “Black Lives Matter” art, only for the city to quickly scrub the statement.

The not-so-subtle shout-out to Gov. Andrew Cuomo and Mayor Bill de Blasio went up around 1 a.m. Saturday on North 15th Street between Wythe Avenue and Banker Street in Williamsburg, during the waning hours of an annual block party which this year doubled as a “small business owner protest,” one attendee told The Post.

“A few partygoers got the idea to paint in huge [letters, using] yellow paint with rollers on North 15th, ‘F–k Cuomo and de Blasio,'” the attendee said Sunday, refusing to be identified by name. “The party continued. Everyone took photos.

“It was a big hit. The crowds cheered, even the cops chuckled.”

But word made it back to city officials, who evidently didn’t share the assessment.

Bucking widely held notions about municipal inefficiency, workers from the city Department of Transportation descended on the display less than 24 hours later — around 10 p.m. Saturday — to cover up the message with black, according to the attendee.

The anti-Gov. Cuomo and Mayor de Blasio mural in Brooklyn

The mural on North 15th Street between Wythe Avenue and Gem Street painted over

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“They told the partygoers it came from up top and they were told the sign said ‘F–k the police,'” the attendee said, though it was unclear whether the workers meant that the order came from top DOT officials or City Hall.

The all-caps, block-length message was in the style of city-sanctioned projects reading “Black Lives Matter” that sprang up during the summer’s fierce protests over police bias and racial injustice — including one outside Manhattan’s Trump Tower, which has become a vandalism magnet.

Even while personally helping plaster that message on public property, de Blasio has nixed efforts to paint a similar display reading “Blue Lives Matter” in support of cops, leading two pro-police groups to take him to court.

City business owners big and small have railed against elected officials’ handling of the coronavirus crisis and its resulting economic fallout.

The DOT and City Hall didn’t immediately respond to requests for comment.

The NYPD confirmed that a criminal mischief complaint had been filed over the incident and that an investigation is ongoing, but did not comment on the claim that cops laughed at the vandalism while doing nothing to stop it.