The Beady Eye frontman told The Daily Telegraph that he is not a fan of the Manchester United striker's new hairstyle and thinks that Rooney should just shave it all off.
"I'm not having it," he said. "He looks like a f***ing balloon with a f***ing Weetabix crushed on top. He's better off as a skinhead, isn't he?"
Manchester City fan Gallagher - who recently opened a store carrying his clothing line Pretty Green in Japan - claimed that despite approaching 40, he still looks "cool as f**k".
"[I hate] old geezers in tracksuits but... I've started wearing slacks and Tod's," he said. "They're great and all that, but I'm thinking, 'Am I losing the plot here?'
He added when asked about older style icons: "Mick Jagger, he's done his time now, hasn't he? He's wearing lovely, nice loafers and his feet are comfortable.
"[When I'm his age] I don't know [what I'll wear], man. [Probably] Pretty Green. As long as you look cool and you've got your own head of hair, that's all I care about."
Gallagher was recently nominated for an NME 'Ultimate Icon' award and is expected to perform at the London 2012 Olympics closing ceremony.
Watch the video for Beady Eye's debut single 'The Roller' below: