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Jyutping baa2 nan2
Pinyin bǎ niǎn

Definitions (Wiktionary)
  1. verb, Cantonese, vulgar
    to do something in vain, to be of fuck all use
    • 搞撚错吖,个政府做嘢把撚吖,又一百人中招。
      搞撚错吖,个政府做嘢把撚吖,又一百人中招。
      gaau2 lan2 co3 aa1, go3 zing3 fu2 zou6 je5 baa2 lan2 aa1, jau6 jat1 baak3 jan4 zung3 ziu1.
      What the fuck, man? The government has been doing a shit job, and now 100 more people got infected.
  2. verb, Cantonese, vulgar
    to masturbate, to jack off

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Jyutping baa2 lan2
Pinyin bǎ niǎn

Definitions (CC-CANTO)
  1. completely useless; totally pointless [colloquial]
Definitions (粵典–words.hk)
  1. 形容詞、粗俗
    字面​解打​J​,​加​係​句​尾​,​去​反諷​某人​嘅​行​為​冇​成效​或​意義​、​徒​勞無功​。
    used to describe ineffective or pointless endeavor
    • 你咁辛苦把撚咩。
      你咁辛苦把撚咩。
      nei5 gam3 san1 fu2 baa2 lan2 me1.
      What's the point of working so arduously?
    • 廿年前生產嘅傳呼機,你送俾我把撚呀?
      廿年前生产嘅传呼机,你送俾我把撚呀?
      jaa6 nin4 cin4 sang1 caan2 ge3 cyun4 fu1 gei1, nei5 sung3 bei2 ngo5 baa2 lan2 aa4?
      What the fuck are you giving me a pager made twenty years ago as a gift?
  2. 近義詞
    托柒、把托
Examples (粵典–words.hk)
  1. Cantonese
    你想松一松啫,去帮衬邪骨把撚咩?
    你想鬆一鬆啫,去幫襯邪骨把撚咩?
    nei5 soeng2 sung1 jat1 sung1 ze1, heoi3 bong1 can3 ce4 gwat1 baa2 lan2 me1?
    • Why the fuck did you go to an evil-bone parlour if you just wanted to relax?
  2. Cantonese
    你咁辛苦把撚咩。
    你咁辛苦把撚咩。
    nei5 gam3 san1 fu2 baa2 lan2 me1.
    • What's the point of working so arduously?
  3. Cantonese
    廿年前生产嘅传呼机,你送俾我把撚呀?
    廿年前生產嘅傳呼機,你送俾我把撚呀?
    jaa6 nin4 cin4 sang1 caan2 ge3 cyun4 fu1 gei1, nei5 sung3 bei2 ngo5 baa2 lan2 aa4?
    • What the fuck are you giving me a pager made twenty years ago as a gift?
Examples (Wiktionary)
  1. Cantonese
    搞撚错吖,个政府做嘢把撚吖,又一百人中招。
    搞撚错吖,个政府做嘢把撚吖,又一百人中招。
    gaau2 lan2 co3 aa1, go3 zing3 fu2 zou6 je5 baa2 lan2 aa1, jau6 jat1 baak3 jan4 zung3 ziu1.
    • What the fuck, man? The government has been doing a shit job, and now 100 more people got infected.