If someone or something queers your pitch, they make it very difficult for you to achieve what you are trying to do. Being followed by a camera crew was queering his pitch. Note: You can also say that someone or something queers the pitch if they make something difficult to achieve. They don't want to queer the pitch in their dealings with foreign governments by publicly criticizing their actions. Note: In the past, a pitch was the place where a showman set up his tent or stall. If anyone, especially the police, spoiled or interrupted his show, they were said to queer the pitch. There is an old verb `queer' which means `cheat' or `spoil'.