偷柴 [－－]

Jyutping tau1 caai4
Pinyin tōu chái

Definitions (CC-CANTO)
  1. to get a boner; to have an erection [colloquial]
Definitions (粵典–words.hk)
  1. 動詞、俚語
    陰莖​勃起
    to erect a penis; to have a hard boner; literally: to steal firewood
  2. 近義詞
    扯旗