Summary
This quote suggests that the speaker believes the person they are addressing is telling a blatant lie. It conveys a strong sense of distrust or disbelief in the person's words. The phrase "in thy foul throat" adds to the intensity of the accusation, implying that the person is not only lying, but doing so in a distasteful or dishonest manner. Overall, it indicates a strong negative reaction towards the person being addressed and emphasizes the lack of trust in their words.