In the US, "geezer" means something completely different: a very old man, with an implication that he is likely somewhat surly and/or eccentric.Possibly a reference to the sort of speech used in Guy Ritchie's films. He was "the bloke who used to be shacked up with Madonna"; he's a British film director. GEEZER is a rather old-fashioned London slang for a man, another word for a bloke, in fact !!
I think that "garbage" is a judgement of the quality of the movie. It's garbage for/about geezers. If the writer were less disapproving, he might have just said geezer-flick.
Movies with primarily female interest that I don't hate are chick-flicks, but the ones I hate might be chick-garbage.