Charlie Sheen got lipo after a prostitute called him fat

Thin-skinned?

Charlie Sheen underwent weight-loss surgery after a sex worker flippantly commented on his gut, he revealed in his new memoir, “The Book of Sheen.”

The actor made the revelation while recalling the time he and his brother, Emilio Estevez, were in Toronto to film the 2000 film “Rated X.” The two portrayed the Mitchell Brothers, pioneers in the pornography business, in the biopic.

Sheen explained that on his final night in Toronto, he decided that his “celibacy streak” needed the “closure” he’d find in “the matchmaking Yellow Pages of Bell Canada.”

The “Two and a Half Men” alum, now 60, proceeded to order a “gorgeous brunette” to his hotel room.

While enjoying a “post-euphoric cigarette” with his “Canadian insta-girlfriend,” Sheen said that the woman “reached over and slapped [his] bar stomach with a room-filling thwack to get [his] attention.”

“Whattya say, Fatso — you up for round two?” she allegedly asked.

Sheen admitted in his memoir that he was devastated by the jibe.

“Wow. Jeez, lady, you had 10,000 nicknames to choose from and you went with that?” he wrote. “I wanted to blow my brains out. It’s amazing where one word can send a guy.”

Sheen added, however, that the comment didn’t stop him from engaging in an encore, as he jokingly recalled, “I did my best not to crush her in the process.”

About a week after he returned to Los Angeles, Sheen visited a “lipo doctor” following the rendezvous.

While recalling the situation in his memoir, Sheen wrote that he had put on some weight at the time as he was newly sober.

“[It’s] pretty common for a lot of folks to gain a buncha weight after getting sober, especially when stimulants were their drug of choice,” he explained. “[But] I’d rather be a bit soft and alive than crack-skinny and f–king dead.”

Sheen spills the beans about his addiction to cocaine and alcohol and colorful love life in “The Book of Sheen,” which is out now.