哺齒 [－齿]

Jyutping bou6 ci2
Pinyin bǔ chǐ

Definitions (Wiktionary)
  1. verb, Min-Nan
    to grind one's teeth during sleep
    (syn.) 磨牙, 咬喙齿, 咬喙齒根, 咬喙齿根, 咬喙齒