stumbler
n. 跌跤者；有过失者；结结巴巴说话者；蹒跚行走者
近义词：bungler，butcher，fuckup，blunderer，botcher，sadsack，fumbler，bumbler，tripper，
英英释义
Noun
- a walker or runner who trips and almost falls
- someone who makes mistakes because of incompetence