Machine Gun Kelly, whose real name is Colson Baker, has resurfaced his long-standing feud with UFC fighter Conor McGregor, posting a series of disparaging remarks on Instagram after McGregor's recent UFC 303 loss.

The musician, 36, shared photos and videos, including footage of McGregor's injury and a clip of their 2021 red carpet altercation, captioning one post with, "knees weak of old age the real conor can't stand up [clown emoji] @thenotoriousmma." He further elaborated in a profanity-laden video rant, stating, "F*** this dude, that’s how beef works, We don’t like each other. We don’t age the same, my knees are awesome."

The initial confrontation between the two public figures occurred in September 2021 at the MTV Video Music Awards red carpet. Reports at the time indicated McGregor approached Kelly for a photo, which Kelly reportedly declined, leading to an exchange of words. The situation escalated, requiring separation, with McGregor allegedly throwing a punch that did not connect. Kelly's then-girlfriend, Megan Fox, was among those who intervened.

Following the red carpet incident, McGregor downplayed the encounter, telling Entertainment Tonight that he only spars with "real fighters" and referred to Kelly as a "vanilla boy rapper." McGregor's representative also stated that McGregor did not initiate the incident and did not know Kelly, except that Kelly attended one of McGregor's fights in July 2021.

Kelly, who has a daughter with Fox, continued to taunt McGregor, referencing the red carpet incident and questioning the whereabouts of additional footage. Despite some criticism for mocking McGregor after his injury, Kelly did not retract his statements, concluding his rant by saying, "Thank you for the walkout being longer than the fight. You wasting everyone’s time. It’s pissing me off."