What is dill and Jem bet?

" To Kill a Mockingbird " by Harper Lee? It is a novel about racial injustice and moral growth in the American South during the 1930s, focusing on the Finch family and their lawyer father, Atticus Finch. Dill and Jem are characters in the novel, with Dill being a friend of Scout and Jem and Jem being Scout's older brother.