time-server (n.)youdaoicibaDictYouDict[time-server 词源字典]
"one who adapts his manners and opinions to the times," 1580s, from expression serve the time "shape one's views to what is in favor" (1550s), translating Latin tempori servire. See time (n.) + serve (v.).[time-server etymology, time-server origin, 英语词源]