Want a definition of Blah, Blah, Blah?  It's the noise coming out of a Dad's mouth when he continues lecturing one of his kids even though he knows that kid has totally tuned him out.  You know what I mean.  The Dad starts off with expressions of exasperation and bewilderment over something the kid has failed to do, and because this is an ongoing issue he quickly moves into lecture mode which he knows is useless based on the glazed expression in the kid's eyes, but because he's ticked off he can't help himself and keeps yammering on until he ends up saying something like, "You have so much ability, but you only use 10% of it. You have to get it together, you have to decide it's time to apply yourself.  Your Mother and I can't do it for you, you have to make that decision for yourself…."

Another sure sign that Dad's entered BlahBlahBlahLand is that his wife, the Mother of the kid, is giving him the "You're an idiot" look over her shoulder as she walks out of the room because she can't stand the spectacle any longer.  Of course she's right, but at least Dad feels like he's done something.