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Jyutping seoi2 sai2 dou1 m4 cing1
Pinyin shuǐ xǐ dōu wú qīng

Definitions (粵典–words.hk)
  1. 語句
    因為​一​啲​嘢​俾​人​誤會​,​無辦​法解釋​清楚
    to be misunderstood so deeply that the situation is beyond repair, literally "cannot be washed clean with water"
Definitions (Wiktionary)
  1. phrase, Cantonese, idiomatic
    to have a wrongful accusation that is unable to be got rid of
    (syn.) 跳進黃河洗不清, 跳入黃河洗不清, 水洗都唔清, 跳到黃河洗不清, 三條坑水洗唔會淨, 跳在黃河洗不清, 跳進黃浦汏勿清, 水洗都唔淨, 三條坑水洗唔淨

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Jyutping seoi2 sai2 dou1 m4 cing1
Pinyin shuǐ xǐ dōu n2 qīng

Definitions (CC-CANTO)
  1. cannot come clean from sins committed (slang)
Examples (粵典–words.hk)
  1. Cantonese
    呢匀水洗都唔清 啰。
    呢勻水洗都唔清 囉。
    ni1 wan4 seoi2 sai2 dou1 m4 cing1 lo3.
    • I am totally being misunderstood this time.