stop splaining

A command to shut someone up when you don't want to hear what the other person has to say, nor explain the reason why.

Larry tried explaining his ambitious unrealized dreams to Anne, but there was no way Anne could understand his rambling lectures, and half baked ideas.
As soon as Larry would say one of his key words Anne was on que like a conditioned Pavlov Dog with rabies uncontrollably command Larry to stop splaining.

Larry would pout, and stammer in response, but with no hope of continuing.