What new habit has Scout picked up that bothers Uncle Jack in Chapter 9 of To Kill a Mockingbird?
Scout always looks forward to seeing her Uncle Jack Finch every Christmas at Finch's Landing. His Christmas presents are awaited with anticipation, and Jack is "one of the few men of science who never terrified me." She enjoyed talking with him, much in the way she talks with Miss Maudie, who is an old friend of Jack's. But Uncle Jack is none too happy about one of Scout's new habits picked up at school. When he told her a tall tale about his cat, Rose Aylmer, Scout responded with
"Aw, that's a damn story..."
Later, when Scout asks him to "pass the damn ham, please," Jack directs her to see him after dinner. He explains that her new habit of cussing is not lady-like and will only get her into trouble.