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Jyutping gon1 tong4
Pinyin gàn táng

Definitions (粵典–words.hk)
  1. 動詞
    啲​錢​用​晒​、​冇​晒​錢
    to be broke, literally "pool dried up"
Definitions (Wiktionary)
  1. verb, Cantonese, figuratively, verb-object
    to be broke; to be penniless
    • 库房近乎干塘。
      库房近乎干塘。
      fu3 fong4 gan6 fu1 gon1 tong4.
      The treasury almost dries up.
  2. verb, Cantonese, Gan, Hakka, dialectal, verb-object
    to dry up a pond

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Jyutping gon1 tong4
Pinyin gān táng

Definitions (CC-CANTO)
  1. depleted; exhausted (can refer to running out of money / exhausted after sex)