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Jyutping bong1 bong1 mong4
Pinyin bāng bang máng ( toneless variant )

Definitions (Wiktionary)
  1. verb
    to help a little; to give a hand
  2. intj, colloquial, sarcastic
    come on (i.e. “help me a little bit and stop doing or saying that”); please; give me a break

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Jyutping bong1 bong1 mong4
Pinyin bāng bāng máng

Definitions (Wiktionary)
  1. verb
    to help a little; to give a hand
  2. intj, colloquial, sarcastic
    come on (i.e. “help me a little bit and stop doing or saying that”); please; give me a break

幫幫忙 [帮帮-]

Jyutping
Pinyin bāng bang máng

Definitions (CC-CEDICT)
  1. to help
  2. to do a favor
  3. (Shanghainese) Come on!
  4. Give me a break!
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    我谢谢你帮帮忙,给我把灯关了,我想睡觉了。
    我謝謝你幫幫忙,給我把燈關了,我想睡覺了。
    wǒ xiè xie nǐ bāng bang máng , gěi wǒ bǎ dēng guān le , wǒ xiǎng shuì jué le 。
    • Thank you for helping me. Please turn off the light, I want to go to sleep.
  2. Mandarin
    帮帮忙啊。
    幫幫忙啊。
    bāng bang máng a 。
    • Help me!
    • Please help!
Examples (Wiktionary)
  1. Mandarin
    搞了半天都未能解决,有没有维基人能帮帮忙?
    搞了半天都未能解決,有沒有維基人能幫幫忙?
    gǎo le bàn tiān dōu wèi néng jiě jué , yǒu méi yǒu wéi jī rén néng bāng bāng máng ?
    • I've been working on this for quite a while, but still am unable to solve the problem. Are there any Wikipedians who can help me out?