The way in which someone speaks. If they have bad articulation, it is generally thought that this person is an imbecile. If they articulate themselves well, you may continue to converse with them.
Bad articulation: "Like, I love the way that the colours in the sky are like totally pretty. I wonder if that's because of the atmosphere or some shit."
Good articulation: "The colours in the sky are fantastic, and very beautiful. Maybe it's because of the atmosphere that they are this way."