“Aaaaah,” said Ron, imitating Professor Trelawney’s mystical whisper, “when two Neptunes appear in the sky, it is a sure sign that a midget in glasses is being born, Harry….”
—
mocking Harry and Professor Trelawney while working with Harry on his star chart in Divination class
(GF13: Mad-Eye Moody)
Ron is not impressed with Professor Trelawney's divining skills.
--AK