滅絕師太 [灭绝师－]

Jyutping mit6 zyut6 si1 taai3
Pinyin miè jué shī tài

Definitions (Wiktionary)
  1. noun, Internet, derogatory, figuratively
    a highly study- or work-focused young woman (especially a female doctoral student or postdoctoral researcher), who is stereotypically cold, stiff, uptight, uninteresting and unromantic