The assignment for this lesson is to play the role of a teacher who is helping students understand Macbeth. Choose one scene from the play and create 12 to 18
annotations, or explanatory notes, to explain the meanings of words and figurative
language and to analyze the poetic structure. Then write one or two conclusion
paragraphs explaining how Shakespeare's language supports the tone and character
development in the scene.

A. Don't ask my friend to help you for the party; she has terrible taste in music

Explanation:

"Poisoning the well" - Can  be defined as unfavourable information, be it true or false about an individual as presented by another to discredit the targeted person. In this case the speaker  is discrediting his friend by giving adverse information, that he has a terrible taste for music. He is discounting the credibility of his friend's ability to assist with the planning of the party.