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Jyutping bou2 fei1
Pinyin bǔ fēi

Definitions (CC-CANTO)
  1. to take remedial actions [colloquial]
Definitions (粵典–words.hk)
  1. 動詞
    上​車後先​至​買​車票​或者​補返​差額
    to buy a ticket or pay back the missing fare after getting on a vehicle
    • 張飛買錯咗,要去詢問處補飛先得。
      张飞买错咗,要去询问处补飞先得。
      zoeng1 fei1 maai5 co3 zo2, jiu3 heoi3 seon1 man6 cyu5 bou2 fei1 sin1 dak1.
      If one made a mistake in buying the single ride ticket, one must visit the service counter to make up the extra fee.
  2. 動詞
    程度​唔​夠​,​要​做​多​一次​補救
    to redo something since its earlier attempt is not good enough
    • 上次染髮染得唔夠色,要補多次飛。
      上次染发染得唔够色,要补多次飞。
      soeng6 ci3 jim5 faat3 jim5 dak1 m4 gau3 sik1, jiu3 bou2 do1 ci3 fei1.
      The color didn't quite stick last time I dye my hair and has to be done again.
Definitions (Wiktionary)
  1. verb, Cantonese, broadly, verb-object
    to (attempt to) do something after the fact
  2. verb, Cantonese, verb-object
    to pay the fare after one is supposed to do so
  3. verb, Cantonese, verb-object
    to recover one's position in a ticket-based queue after one's ticket number has been called
Examples (粵典–words.hk)
  1. Cantonese
    张飞买错咗,要去询问处补飞先得。
    張飛買錯咗,要去詢問處補飛先得。
    zoeng1 fei1 maai5 co3 zo2, jiu3 heoi3 seon1 man6 cyu5 bou2 fei1 sin1 dak1.
    • If one made a mistake in buying the single ride ticket, one must visit the service counter to make up the extra fee.