It’s every Restaurant Man for himself!

Eataly co-owner Joe Bastianich is defending the scathing potshots in his new memoir, saying the once-friendly critics and fellow restaurateurs he targeted are getting their just desserts.

“I don’t think I’m losing any new friends,” said Bastianich, partner of Mario Batali and proprietor of the Italian empire that includes Babbo and Del Posto. “Perhaps those friends were long lost.”

His expletive-filled tome, “Restaurant Man,” has sparked public feuds for calling Esquire reviewer John Mariani “a self-righteous, condescending [expletive]” and for describing Le Cirque boss Sirio Maccioni, 80, as “facing oblivion.”

But Bastianich, son of celeb chef Lidia Bastianich, says he’s just serving up the truth and has no reservations about branding chef Pino Luongo “a withering douchebag” and The Post’s Steve Cuozzo “f–king stupid” over a headline that never existed.

“When I wrote the book I made a promise that it would be uncompromising and written in my voice,” Bastianich told The Post. “If it’s brash and slightly vulgar, I’m from Queens — that’s the way we talk.”

The fighting words for Mariani stem from a supposed incident 20 years ago, when the food critic knocked the fish at Becco as the worst he’d ever had.

“I was standing there, emasculated, in front of an entire dining room full of people,” Bastianich wrote. “He just sliced my balls off, right there at tableside, and let me bleed from my crotch as his guests smirked and laughed on.”

Mariani reacted with a biting letter, calling the story “so duplicitous that it’s difficult to imagine you are truly the son of your ever-cordial, ever-civilized parents.” Bastianich said he wouldn’t deign to respond.

He did, however, send copies of the memoir to Maccioni and his sons after foodies rushed to the family’s defense.

He said the book is a user’s manual for fine diners and future Danny Meyers.