"incompetent or foolish but likeable person," by 1930 (according to Partridge). There was a character Little Mook in a series of children's stories c. 1900.
updated on August 16, 2022
英语词源词典收录了45867条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。