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Jyutping lou5 ceoi1
Pinyin lǎo chuī

Definitions (CC-CANTO)
  1. to bullshit; to talk nonsense [colloquial]
Definitions (粵典–words.hk)
  1. 動詞
    冇​根據​咁​講某​啲​嘢​、​唔​經大腦​講野
    to talk nonsense; to bullshit
    • 你唔好信佢,佢最鍾意老吹。
      你唔好信佢,佢最钟意老吹。
      nei5 m4 hou2 seon3 keoi5, keoi5 zeoi3 zung1 ji3 lou5 ceoi1.
      Don't believe him, he always talks nonsense.
  2. 近義詞
    亂噏、老作
Definitions (Wiktionary)
  1. verb, Cantonese, Hong-Kong
    to talk big or talk nonsense
Examples (Tatoeba—Cantonese-English)
  1. Cantonese
    冇足够证据证明自己喺啱,咪老吹啲嘢出嚟啰。
    冇足夠證據證明自己喺啱,咪老吹啲嘢出嚟囉。
    mou5 zuk1 gau3 zing3 geoi3 zing3 ming4 zi6 gei2 hai2 ngaam1 , mi1 lou5 ceoi1 di1 je5 ceot1 lai4 lo1 。
    • If you don't have enough evidence to convince the other person you're right, make stuff up.
Examples (粵典–words.hk)
  1. Cantonese
    你唔好信佢,佢最钟意老吹。
    你唔好信佢,佢最鍾意老吹。
    nei5 m4 hou2 seon3 keoi5, keoi5 zeoi3 zung1 ji3 lou5 ceoi1.
    • Don't believe him, he always talks nonsense.