Its from from Billy Madison (1995) where the principal criticised Billy for his incoherent ramblings. The line is often used as a copypasta to roast people online.
What you've just said is one of the most insanely idiotic things I have ever heard. At no point in your rambling, incoherent response were you even close to anything that could be considered a rational thought. Everyone in this room is now dumber for having listened to it. I award you no points, and may God have mercy on your soul.