slowcoach /ˈsləʊˌkəʊtʃ/

• 1. 

  N a person who moves, acts, or works slowly 迟钝的人; 慢性子的人 (US and Canadian equivalent slowpoke) [英国英语] [非正式]

  例：

  "Come on, slowcoach," said Frank, pushing up the pace still more.

  “快点，你个慢性子，”法兰克说，一边加快了步伐