Similar to work hot, someone who is not really that attractive but because of where they are or who they are surrounded by appears hot. This often leads to her receiving undeserved and unprecedented attention and men doing foolish things like sleeping with her.
I need to dump Sandra. I met her in the Faculty of Engineering and wrongly thought she was hot. I brought her to a frat party and realized she was actually kinda ugly. Turns out Sandra was only a situational goddess: she only looks good when surrounded by ugly people.