Webgiving too much attention to small details that are not important in a way that annoys other people. niggling uk / ˈnɪg.əl.ɪŋ/ us / ˈnɪg.əl.ɪŋ/ adjective UK. criticizing someone about small details or giving too much attention to details: a niggling comment/criticism 挑剔的评论/批评.