A heterosexual person who can't mind their own business, centers themselves around queer narratives that have nothing to do with them, is constantly in a state of upset when exposed to something that is exclusively for queer people and not them. Definitely smells like a jizz sock, uses 3-1 shampoo, and can't tell the difference between hummus and tzatziki.
Oh, you have a problem with Batman's newRobin being queer? Sounds like you might actually just be an upseterosexual. Seek help, friend <3
A blend, or portmanteau, of upsetting and unsetteling. It's used to describe the feeling that you can have when you get the creeps but also feel shocked.
The upsetteling old photo of the disformed baby in the jar made me feel very upsetteled.