What is the Slang meaning for natch?
usually it is referring to a female's crotch area, also called 'snatch'
I think it would depend on the meaning of the word. Does the slang have a hateful or derogatory meaning, or is it a slur? If so, then no. If it has no hateful or derogatory connotations, then there's nothing wrong with it. Technnically speaking the word 'OK' is slang and nobody gets upset about that.