Someone who is at risk of flirting or being flirted with because of their unconscious friendly nature or subtle sexual undertones in their personality.
He didn’t want his girlfriend to go on vacation with her friends because she’s a flirt risk
Much like Schrodinger’s Joke, Schrodinger’s Flirt is a flirtatious gesture in which, if one or both parties are clearly joking, then neither should take it seriously, but if they are both serious then they should let fly.
Friend: “Hey dude, she was clearly flirting with you. Did you tap that?”
Other Friend: “Nah man, Schrodinger’s Flirt. Schrodinger's Flirt means it’s just a joke between us but if she ever was dead serious, I’d fuck her everyday of the week and twice on Sunday.”