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Jyutping jat1 mau5 saam1 fan1 dei6
Pinyin yī mǔ sān fēn dì

Definitions (Wiktionary)
  1. noun
    tiny piece of land
  2. noun, figuratively
    one's turf; one's personal territory

一畝三分地 [-亩---]

Jyutping
Pinyin yī mǔ sān fēn dì

Definitions (CC-CEDICT)
  1. a piece of land of 1.3 mu 畝|亩[mu3]
  2. (fig.) one's turf