大諗頭 [－谂头]

Jyutping daai6 nam2 tau4
Pinyin dà shěn tóu

Definitions (CC-CANTO)
  1. full of useless or impractical ideas (spoken)
Definitions (粵典–words.hk)
  1. 形容詞
    形容​一個​人​或者​一個​計劃​太​進取​、​冒險​，​好難​實現
    ambitious, over-ambitious; literally "big thinking"
  2. 近義詞
    大想頭