粗口爛舌 [－－烂－]

Jyutping cou1 hau2 laan6 sit3
Pinyin cū kǒu làn shé

Definitions (粵典–words.hk)
  1. 形容詞
    講​嘢​講得​好​粗魯​、​爛口​，​成日講​粗口
    swearing a lot; using a lot of bad language; speaking "foul language" all the time
    • 佢自己都粗口爛舌，好難叫佢啲細路唔講。
      佢自己都粗口烂舌，好难叫佢啲细路唔讲。
      keoi5 zi6 gei2 dou1 cou1 hau2 laan6 sit3, hou2 naan4 giu3 keoi5 di1 sai3 lou6 m4 gong2.
      It's hard to tell his children not to swear when he's cursing like a sailor.

粗口爛舌 [－－烂－]

Jyutping cou1 hau2 laan6 sit6
Pinyin cū kǒu làn shé

Definitions (CC-CANTO)
  1. (adjective) vulgar; foul-mouthed
Definitions (粵典–words.hk)
  1. 形容詞
    講​嘢​講得​好​粗魯​、​爛口​，​成日講​粗口
    swearing a lot; using a lot of bad language; speaking "foul language" all the time
    • 佢自己都粗口爛舌，好難叫佢啲細路唔講。
      佢自己都粗口烂舌，好难叫佢啲细路唔讲。
      keoi5 zi6 gei2 dou1 cou1 hau2 laan6 sit3, hou2 naan4 giu3 keoi5 di1 sai3 lou6 m4 gong2.
      It's hard to tell his children not to swear when he's cursing like a sailor.
Definitions (Wiktionary)
  1. phrase, Cantonese, idiomatic
    potty-mouthed; foul-mouthed
    (syn.) 爛口, 烂口
Definitions (Kaifangcidian)
  1. 說話粗鄙下流 – 说话粗鄙下流
  2. 愛說粗話 – 爱说粗话
Examples (粵典–words.hk)
  1. Cantonese
    粗口烂舌
    粗口爛舌
    cou1 hau2 laan6 sit3
    • swearing a lot
  2. Cantonese
    佢自己都粗口烂舌，好难叫佢啲细路唔讲。
    佢自己都粗口爛舌，好難叫佢啲細路唔講。
    keoi5 zi6 gei2 dou1 cou1 hau2 laan6 sit3, hou2 naan4 giu3 keoi5 di1 sai3 lou6 m4 gong2.
    • It's hard to tell his children not to swear when he's cursing like a sailor.