一門心思 [－门－－]

Jyutping jat1 mun4 sam1 si1
Pinyin yī mén xīn si

Definitions (CC-CEDICT)
  1. to set one's heart on sth (idiom)
Definitions (Wiktionary)
  1. adv, colloquial
    wholeheartedly
    (syn.) 一门心, 一門心
Examples (Wiktionary)
  1. Mandarin
    你这一门心思，谁猜得到？
    你這一門心思，誰猜得到？
    nǐ zhè yī mén xīn sī ， shéi cāi dé dào ？
    • Who could have guessed all that in your mind?