Pink has slammed internet trolls as "f***ing disgusting" after they commented on her 2-year-old's genitalia.

The pop star posted a photo with her kids Willow Sage, 7, and Jameson Moon Hart, 2, in which Jameson wasn't wearing any bottoms.

The three of them were interacting with a pelican but some fans opted to focus in on Jameson's penis, commenting on Pink's decision to have him circumcised.

One even went so far as to say she had "mutilated" her son, saying she had made a "parenting choice" to "do a cosmetic surgery on her perfectly healthy son's genitals".

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Pink was understandably appalled and deleted the photo before reposting it with black markings covering her son's lower half.

She wrote: "There's something seriously wrong with a lot of you out there. Going off about my baby's penis? About circumcision??? Are you for real? As any normal mother at the beach, I didn't even notice he took off his swim diaper.

"I deleted it because you're all f***ing disgusting. And now I'm turning off my comments and shaking my head at the state of social media and keyboard warriors and the negativity that you bring to other people's lives. There is something seriously wrong with a lot of you out there. Smfh [shaking my f***ing head]."

She added: "Here's a picture of the pelican we obviously caught and abused for hours before dangling baby penis in its face."

Fortunately, other fans commented messages of support.

One wrote: "Wow...I guess I didn't examine the pelican photo because I didn't even notice that Jameson didn't have any bottoms on... I noticed a cute photo of a mama and her babies enjoying a moment in life."