Who you calling chicken?

At a Grammys party in LA, Oscar contender Sylvester Stallone bumped into New York restaurateur Butch Yamali, who reminded the star that he used to work for Yamali’s dad at the Dover Deli on Manhattan’s East Side.

Spies said Stallone shot back, “How can I forget? I was arrested at your [bleeping] deli!”

It seems Sly was once cuffed by cops for “throwing a chicken in a customer’s face.”

His rep didn’t get back to us, but a 1976 Chicago Tribune profile we unearthed reveals that the “Rocky” legend worked at the Dover after quitting the famed Actors Studio in frustration before making it.

He instead “spent his night cutting fish heads.”

“I really got good at my work,” he said, “I could moonlight at Bellevue doing lobotomies.”

He hid his job from future wife Sasha (now his ex), whom he’d told he was a “big-time entrepreneur” — till she walked in and saw him behind the counter.

When Sly made a delivery to Broadway’s David Merrick, he thought, “What do I do? . . . Say, ‘I’m not really a delivery boy, I’m the star of your next show’?” Merrick tipped him a quarter.