鐵齒 [铁齿]

Jyutping tit3 ci2
Pinyin tiě chǐ

Definitions (Wiktionary)
  1. adj, Min-Nan, Taiwanese-Mandarin
    firm in speech; obstinate; opinionated; argumentative
  2. adj, Mainland-China
    eloquent; persuasive in speech
Definitions (兩岸三地生活差異詞語彙編—Two Shores Three Places)
  1. 臺陸用法和差異
    兩岸​在​「​鐵齒​」​的​用詞​上​，​意思​大不相同​。​臺灣​所說​的​「​鐵齒​」​是​形容​人​固執​嘴硬​，​如​：​舉頭​三尺​有​神明​，​為​人​說話​別太鐵齒​，​免得​遭禍​。​而​在​大陸​所說​的​「​鐵齒​」​是​形容​一個​人​能言善道​、​言語​犀利​，​如​先前​的​著名​大陸​連續劇​「​鐵齒​銅牙​紀曉嵐​」​，​說​的​不是​紀曉嵐​性格​固執​，​而是​他​的​口齒​便給​、​語言​犀利​。

鐵齒 [铁齿]

Jyutping
Pinyin tiě chǐ

Definitions (CC-CEDICT)
  1. (Tw) obstinate; argumentative; opinionated; skeptical of superstitions (from Taiwanese, Tai-lo pr. [thih-khí])