Basically what the commenter above me said. A straight person who feels 'queer' because they once did some minor thing like kissed a girl/got the hots watching two men kiss/said they fancied this or that famous person. These people are rife in academia, and they absolutely LOVE queer theory because it gives them a way to makes themselves feel rebellious and insert themselves into the gay movement.

One of the central tenants of queer theory is that social change comes about via individuals who rebel against social norms, including heterosexuality (not via doing boring political advocacy cos that's no fun!). So these het dumb asses position themselves as being sexual rebels because they once 'transgressed' heterosexual norms in some extremely minor way, and then have the gall to think they know what it means to be LGB.

There's a lot of criticisms to be made of queer theory, but one thing that has always really peeved me about it is that it very much positions LGB people as being freaks/outsiders/transgressors/weirdos etc. It's actually the opposite of what the gay movement fought for, which was for same-sex attracted people to get to live normal lives like everyone else. So when these heterosexual academics get all fired up about queer theory, it's also because they sub-consciously view LGB people as being freaks and whatever else, and can legitimise that homophobia via adopting queer theory. Also, there's a lot of weird fetishisation of gay people that goes on amongst them. I despise them.