lit. even jumping into the Yellow River can't get you clean
fig. to become inexorably mixed up
mired in controversy
in deep trouble
Definitions (Wiktionary)
phrase, 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