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I wasn’t masturbating, I was holding in 3 jumbo iced teas!

Is that a 20-ounce can of iced tea in your prison pants or are you just happy to see me?

The infamous cop-killer who escaped from New York’s largest maximum-security prison in 2015 insists he wasn’t pleasuring himself during a recent visit with his gal pal — he was just busting to take a leak in a pair of crotch-enhancing trousers.

“The visit was almost over and I’d drank about three and a half 20-ounce iced teas … I really needed to pee,” Sweat told The Post on Friday during an exclusive, hour-long interview at the Attica Correctional Facility outside Buffalo.

“Like any little boy or man would do, I grabbed it like, ‘Man, I really have to pee.’”

Sources say Sweat was punished for fondling himself through his state-issued prison pants in the upstate lockup’s visiting area March 8 — with his sweetheart, Frances Malanik, reaching through a partition to help out.

But the cop-killer claims it’s all a beat-up by the guards — who are out to get him because once he arrived at the prison, security cameras were installed everywhere, making it harder for officers to hide their own dirty deeds.

Sweat maintains he was only adjusting his junk and squirming in his seat during the visit in question because of his desperate need to relieve himself.

The tough, canvas-like material of his hunter green uniform also “makes it look like I have a hard-on anyway,” he claimed.

As for the hand his new “Shawskank” allegedly lent, Sweat claims he stood up while the pair were holding hands — which put his crotch in proximity to his fiancée’s hands, making it appear that she was touching his private parts.

Sweat’s been on a hunger strike since he arrived at Attica four months ago because he thinks the guards are trying to poison his food.

He says he’s even stopped showering in the stalls because he doesn’t want to be vulnerable around a correction officer.

“They bring a bucket of hot water in the morning and that’s basically what I’ve been using,” he said.

He and Malanik, 45, began dating after his notorious 2015 escape — which saw Sweat and fellow convicted murderer Richard Matt busting out of the Clinton Correction Facility with the help of jail worker Joyce Mitchell.

Sources revealed that Mitchell had sex with both ­men — earning her the nickname “Shawskank.”