The rock singer was mocked by Kay after he threw his award and microphone into the audience following Oasis' victory in the 'Brits Album of 30 Years' category. The stand-up comic, who was hosting the event at Earls Court, quipped: "What a kn*bhead."
Responding on Twitter to Kay's jibe, Gallagher wrote: "Listen up fat f**k as a real Northerner I was brought up to say s**t to people's faces not behind their back. Live forever LG."
Liam's brother and former bandmate Noel mocked the controversial acceptance speech at an afterparty last night.
Kay and Liam previously clashed at the NME Awards in 2001, when the Oasis frontman refused to collect a gong from the stage. The Phoenix Nights star brought the singer his award and teased about his attire. "Me mam's been looking for that coat," joked Kay.