Robert De Niro dropped the f-bomb – twice – on CNN Sunday as he hit back at critics who disagree with his anti-​President ​Trump stance.

“F​–k ‘em. F​–k ‘em,” ​the “Raging Bull” Oscar-winner responded after trashing Trump and Fox News pundits on the president’s side on “Reliable Sources” with Brian Stelter.

A voice from off-set could be heard yelling “woahhhh,” at De Niro’s double four-letter drop.

“Sorry. Sorry,” the actor said.

“This is cable, so it’s not an FCC violation, but it still is a Sunday morning,” host Stelter commented.

During the full interview, which Stelter posted online, De Niro said he believed the president wasn’t capable of resigning from office.

He also described the president as a “gangster” and called Trump “crazy.”

Stelter asked if De Niro meant in the medical sense.

“Possibly medically too,” De Niro said. “I didn’t think that before, but now I actually – when I saw him out in front of the helicopter waiting to go somewhere, talking endlessly and sweating and sweating … this guy, he’s not even aware of what he’s – he should at least ask somebody for a handkerchief or something and dry himself off.”

“There’s just something very strange,” the actor added.

Stelter asked ​the “Taxi Driver” star if he thought Trump’s behavior could be acting.

“In some ways, I think he is,” De Niro answered. “As I think some of these pundits on Fox are too,” he volunteered. “Because I can’t believe they would actually buy into this craziness. This guy should not be president, period.”