Someone who attacks LGBT (Lesbian Gay Bisexual Transgender) people for deviating from the norm. This can take two forms:
1) Verbal abuse eg "Go stick ur tranni cock up ur dad's ass u mo-fo fudge-packer!"
2) Physical eg slapping, punching, kicking, tripping etc.
Queer basher shouts to a homo making a move on him: "Fuck off u arse bandit!"