"Know you me"?

Okay, so I'm from Cleveland and my Dad always says "Know you me" or "Know me you" (I can't remember which). He usually says it before something he considers as a blatant truth. It's like his way of saying "Listen up, because this is the truth".

I'm not sure if this is a Cleveland thing, or if he picked this up from where he lives now(he moved out to far southeast side and there's a lot of 'country' folk that far away from the city. Let's put it this way-- he's far enough into the boonies that he has well water--sick!).

Or maybe it's from a TV show back when he was a kid?

I'm just trying to figure where this came from! It drives me up a wall when he says it, because I can't figure out where in the heck it came from!

Thanks, and I hope someone can help me out.