Hi there and thank you for the question. I am a Registered Nurse and will be happy to help you today.
It is hard to say whether or not it is safe to eat or not....lots of variables. If you purchased your lunch meat from a deli, it is most likely not safe to eat because these cuts are from pieces of meat that are not as highly cured as the lunch meats that are in the packages that you buy. Also, certain types of meat are more apt to spoil that others...chicken will spoil faster than ham because of the sodium content. Also, there are variables like how cold your refrigerator is and how often the door is open.
The thing to remember is, if the cut of meat was bad, you might get sick from it and you might not. Things to expect would be stomach pain, diarrhea, and possible vomiting.
But to answer your question directly...in the future, I would say no, it is not safe to eat. You would be taking a huge chance by eating it.