मुँह काला करना मतलब - ऐसा घृणित आचरण करना जिससे कलंक लगे।
Here is meaning of Muh Kala Karna in hindi. Get definition and hindi meaning of Muh Kala Karna. What is Hindi definition and meaning of Muh Kala Karna ? (hindi matlab - arth kya hai?).