book club seppuku

When a member of a book club should be ashamed of their choice of selection, thereby subjecting the group to a woefully disdainful pick.

Laura: "God, what was Sara thinking when she picked 'The Devil Wears Prada?' She should be ashamed of herself."
Rob: "I know, right? If I were her, I'd be committing book club seppuku at our next meeting."
Laura: "Ha! Yeah, but I don't want blood on the carpet. Or on the apple cakes."