Brace yourself. "Neta" is one of the most versatile and widely used slang word in Mexico. This Mexican Spanish slang comes from French or Latin words that mean "net" (pure, spotless). In Mexico, neta is used to state that what is being said is the truth. It could also be used to say that someone or something is "the real deal". In almost every case, this slang word, neta, is used in a positive light. The only common case where "neta" would be used in a negative light is if someone really did you wrong. In this case, all you would say/ask, "neta?" (similar to "I see how it is" in English). Similar words or phrases in English would be "for real", "really", "seriously", "truthfully, and "honestly".