Quote by Terry Pratchett
Using a metaphor in front of a man as unimaginative as Ridcully was like ared flag to a bu... was like putting something very annoying in front ofsomeone who was annoyed by it.
Summary
This quote suggests that using a metaphor in the presence of a person who is unimaginative, like Ridcully, is ineffective and even irritating. The comparison to a red flag indicates that a metaphor only serves to exacerbate the annoyance felt by an already frustrated individual. In other words, it implies that attempting to communicate through figurative language with someone who lacks imagination is a futile and aggravating endeavor.