grumbling appendix
noun [ C usually singular ] UK uk/ˌɡrʌm.bəl.ɪŋ əˈpen.dɪks/ us/ˌɡrʌm.bəl.ɪŋ əˈpen.dɪks/
阑尾阵痛（指阑尾持续轻微疼痛但未形成阑尾炎）
a medical condition in which the appendix (= the tube-shaped part that is joined to the intestines) causes you slight pain over a period of time