When a guy steals a girl with whom you weren't dating, but chatting up numerous times in hopes of one day dating her (can also apply to girls). People like Mr. Steal yo Potential Girl are what causes others to be placed in the friendzone
Person A: dude, see that girl over there? I've been chatting her up for an hour, and I think I we are hitting it off!
Person B: cool story bro. I'll be right back *Person B leaves

-later-

Person A: yo, what took you so long, I've been waiting for 20 minutes!
Person B: oh, I was just getting that girl's number. We're doing some stuff tomorrow.
Person A: that's the same girl from earlier, jerk. God, stop being such a Mr. Steal yo Potential Girl.
Person B: that title it too long.
Person A: whatever douchebag.
by Python22 October 9, 2013
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