Charles Barkley broke Shaq with his ‘sitting on the Monstah’ Boston accent comment

What the Chuck did he say?

Charles Barkley’s attempt at a Boston accent was hysterical, but it’s what he said that really had Shaquille O’Neal nearly laughing out of his seat during TNT’s “Inside the NBA” on Thursday.

Following Boston’s 110-97 Game 5 win over Miami in the Eastern Conference Finals, the “Inside The NBA” crew — which filmed on location at TD Garden — each read a sentence with a Boston accent.

When it was Barkley’s turn, he read: “saw Ernie at Fenway Park eating chowder on top of the monster.”

His Boston accent failed miserably, with him pronouncing the word “monster” as “mon-stah.”

That’s when Shaq completely lost it and was doubled over on the desk in laughter.

Kenny Smith also couldn’t contain his laughter — and Ernie Johnson did his best to keep the segment moving.

After Barkley read the sentence for a second time, Shaq trolled him about how he said Johnson’s first name.

“Why are you y’all doing this to this guy man? Come on,” Smith said.

Then, Barkley kept repeating the line, “sit on top of the monster,” which put Shaq and Smith over the edge with laughter.

“I’ll donate money to charity to sit on top of the monster,” Barkley said.

Smith chimed in with: “Just a viral moment waiting to happen, man.”

Shaq asked, “Whatchu you want to sit on Chuck?”

Johnson, who kept his cool throughout the segment, tried to diffuse the laughter.

“Stop it man, stop Shaq,” he said.

However, the Big Aristotle was still hysterically laughing.

“On today’s episode of ‘what the Chuck did you say?’” the Basketball Hall of Famer said.

Game 6 shifts back to Miami on Saturday, when the “Inside the NBA” crew will film the show at the Kaseya Center.