I want to know the answer to the following question:
What is a giant killer?
All the background I'm provided with is that "The possibility of unlikely victories in the earlier rounds of the competition, where lower ranked teams beat higher placed opposition, known as "giant killings", is much anticipated by the public, and is considered an integral part of the tradition and prestige of the competition, alongside that gained by teams winning the competition.". Is that enough to answer the question?
Answer: yes