說夢話 [说梦话]

Jyutping syut3 mung6 waa6
Pinyin shuō mèng huà

Definitions (Wiktionary)
  1. verb, figuratively, verb-object
    to talk about nonsense things; to say preposterous things
    (syn.) 呓语, 囈語, 梦呓, 夢囈
  2. verb, verb-object
    to talk in one's sleep; to sleeptalk
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    汤姆有时会说梦话。
    湯姆有時會說夢話。
    tāng mǔ yǒu shí huì shuō mèng huà 。
    • Tom sometimes talks in his sleep.