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Jyutping bit6 jau5 jung6 sam1
Pinyin bié yǒu yòng xīn

Definitions (CC-CEDICT)
  1. to have an ulterior motive (idiom)
Definitions (粵典–words.hk)
  1. 語句
    一個​人​嘅​言​論​或者​行動​另​有​企圖​或者​目的
    with a hidden agenda or an ulterior motive
    • 佢咁做一定別有用心。
      佢咁做一定别有用心。
      keoi5 gam2 zou6 jat1 ding6 bit6 jau5 jung6 sam1.
      There must be a hidden agenda in his action.
Definitions (Wiktionary)
  1. phrase, idiomatic
    to have an ulterior motive
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    政治家从来不告诉我们他们的别有用心。
    政治家從來不告訴我們他們的別有用心。
    zhèng zhì jiā cóng lái bù gào sù wǒ men tā men de bié yǒu yòng xīn 。
    • Politicians never tell us their inner thoughts.
Examples (粵典–words.hk)
  1. Cantonese
    别有用心
    別有用心
    bit1 jau5 jung6 sam1
    • to have ulterior motives
  2. Cantonese
    佢咁做一定别有用心。
    佢咁做一定別有用心。
    keoi5 gam2 zou6 jat1 ding6 bit6 jau5 jung6 sam1.
    • There must be a hidden agenda in his action.