If puns are “the lowest and most groveling form of wit,” where does the jokey/dopey action comedy “Heads of State” sit on that scale?

It’s got puns. Groaners. Lots of them. And action film cliches and buddy comedy bickering and a ludicrous/obvious plot that calls attention to itself and mocks itself, as if that’ll stop us from doing the same.

A film starting out from “Let’s reunite those two supporting players from ‘Suicide Squad‘” as its big idea sets the bar pretty low. But Idris Elba and John Cena, as an “embattled” British Prime Minister (Yes, we know the PM’s not “Head of State.” Shaddup.) and movie-star/pop icon U.S. president thrown together to fight for their lives, NATO and the future handle the banter and the tough-guys-trash-talking-each-other business with ease.

“Drop warheads on foreheads?”

“Where’s your back-up?” “There IS no back-up!”

A kicker — “It’ll be great for our memoirs.”

Priyanka Chopra Jonas handles fight choreography with aplomb, and Paddy Considine tries to give us something — anything — interesting in his shade of villain.

“Hardcore Henry” and “Nobody” director Ilya Naishuller pulls out more of his Guy Ritchie editing tricks — boiling down entire harrowing escapes to short and silly “How’d you FIND us?” montages.

But damn, the been-there/needle-dropped that feeling is strong with this one. The “dumb” just won’t quit.

A trio of screenwriters, including a “Mission: Impossibl” duo do-over pile on the travel, the epic set pieces and the mayhem and try to find the fun in all of that.

When you’re putting Air Force One in a dogfight and staging a bloody ambush in Buñol, Spain’s over-the-top tomato-tossing food fight (La Tomatina), who cares about helicopter crashes, presidential limo chases and Jack Quaid as a gun-slinging not-really-amusing nerd of a CIA agent?

The story — a wildly popular president stops in London to meet an unpopular prime minister who all but endorsed his opponent in a recent election. One is great at working the press. The other? More statesmanlike.

“He still hasn’t figured out the difference between a press junket (promoting a movie) and a press conference!”

Maybe PM Sam Clarke is just jealous of Will M. Derringer’s cool name, and initials — “WMD” — and his box office take.

“The universe keeps telling me I look good with a gun in my hand!” the cinema’s once-and-future “Water Cobra” jokes.

But when the two try to mend fences on the way to a NATO summit on Air Force One, they’re shot down. They’ve got to get along, work together and fight and trick their way from Belarus to Warsaw and on to Trieste. Because somebody’s hijacked the CIA’s super surveillance ECHELON system and is plotting their demise, and NATO’s.

Jonas plays an ace MI-6 agent who used to have a thing with our PM. Quaid’s a Warsaw Station agent just tickled that his favorite action hero turned president is dropped into his care, if only briefly.

Agent Comer has just enough time to arm up in the cliched “Look at my ARSENAL” scene and load up The Beastie Boys (“Sabotage”) on the CD player.

A little Mötley Crüe here, some “Total Eclipse of the Heart” Bonnie Tyler there, and you’ve got your soundtrack to your formulaic action comedy.

Comedy mainstay Stephen Root is here to tip us about the tone they were going for, and plays maybe the least funny role in “Heads of State.” Wade Briggs, Katrina Durden and Alexander Kuznetsov are costumed, hair-dyed and shaved to look like everybody’s idea of a villain.

Look for Sharlto Copley in a single scene and “Mission: Impossible” vet Ingeborga Dapkunaite as a Belorusian sheep farmer.

But all those players are but pawns in the big, fat empty-headed action beats involving brawls, shoot-outs, chases and a hysterically high body count in a movie you don’t so much watch as “consume.”

It turns out that reuniting Bloodsport and Peacemaker from “Suicide Squad” wasn’t the can’t-miss that nobody predicted.

Rating: PG-13, lots and lots of violence, some of it bloody.

Cast: John Cena, Idris Elba, Priyanka Chopra Jonas, Jack Quaid, Carla Gugino, Stephen Root, Sharlto Copley and Paddy Considine.

Credits: Directed by Ilya Naishuller, scripted by Josh Appelbaum, André Nemec and Harrison Query. An MGM/Amazon Prime release.

Running time: 1:54