Literally, it means killing, like a vampire slayer is someone who slays vampires.
However, it gets used like killing does. "She KILLED that performance! WHOO!'
Although, oddly enough, I only see "slay" used like this in reference to Beyonce. I have no idea why. My friend who loves Beyonce keeps posting and reposting stuff using "slay" like that whenever Beyonce has a major performance or other widely publicized thing. Was it in one of her songs or something? I don't know.
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Necro910: That Krieger Dude
Feb 15, 2016 at 02:12PM EST in reply to
Hot Sauce
Feb 16, 2016 at 10:59AM EST in reply to