Its self explanatory and is used if you dont know what to say anymore
Guy: So whats the answer to the physics question 9?
You: Rapey the Snakey
Guy: k
When you meet a stranger and you're not hitting on him but socializing and as the night progresses he goes from no sexual intentions towards you to a slightly scary creeper. This can be true to for men meeting women but that's more of a zero to clingy scenerio.
I meet this guy at the hotel bar on a business trip, he went from zero to rapey in three drinks flat.
the scale all girls have to get a feel of the dude they are talking to. 10 being hella rapey, 1 being bring your mace, but he should be good.
girl one: what do you think of him?
girl two: idk my rapey radar is still figuring him out.
girl one: bro the rapey radar on that dude is high. gtfo now.