The Beady Eye star was asked for his opinion on the rapper in a new interview with British GQ and he didn't hold back.
Calling the father-to-be a "f**kin' clown", Gallagher singled out West's recent embarrassing encounter with a traffic sign as he tried to avoid paparazzi upon leaving a building with his pregnant girlfriend Kim Kardashian.
The rocker said, "Have you seen when he bumped his head? He's coming out of the gym with that bird (woman) and there are geezers taking pictures. You have to put your head up and carry on walking.
"He's gone and walked straight into a f**king pole. You hear it go 'dink' and him tell people to stop taking pictures. Put your head up so you know what you're doing! Smashed his head up. He's a f**king idiot."
The attack could not have come at a worse time for Kanye, who is preparing to release his new album Yeezus amid claims he cheated on his girlfriend with a Canadian model, who sold her story to America's Star tabloid.
A spokesperson for Kardashian has denied Leyla Ghobadi's allegations and West's handlers have also shut down her story, stating, "This most recent attack on Kanye West and his family is totally without merit. It's a blatant attempt by a misguided individual who is clearly seeking publicity, and another in a series of malicious stories drummed up by non-credible 'news' sources. This is a sad attempt to hurt two people trying to live their lives."
West and Kardashian are due to welcome a daughter together next month (Jul13).