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Jyutping ji4 man4 gaam1
Pinyin yí mín jiān

Definitions (Wiktionary)
  1. noun, disapproving, neologism, slang
    the period for which an immigrant must stay in the new country in order to retain permanent residency or to apply for citizenship

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Jyutping ji4 man4 gaam1
Pinyin yí2min jiān

Definitions (CC-CANTO)
  1. to be restricted to remain overseas in a country for a minimum period in order to gain permanent resident citizenship status [written and colloquial]