What the Spanish word ching mean?

"Ching" is not a real Spanish word. It's likely you're thinking of a similar-sounding word, "chingar".

However, "chingar" is a very vulgar word in Spanish, equivalent to the English "f*".** It is extremely offensive and should be avoided in most situations.

It's important to be mindful of the language you use and avoid using offensive words, especially in a foreign language where you may not be familiar with all the nuances of meaning.