Can olives go bad?

What is a while? they can last if covered in liquid about a year. They should be slimy if they are bad.

I had bad olives once from a salad bar in a grocery store. They smelled rancid, and were slimy, like @marinelife said. Yick.

I do not know if the oil-cured olives go bad, but if they are olives in brine, such as green olives, they should be good indefinitely (or at least a year) as long as they stay covered.

You would know it if your olives had gone off. You wouldn’t be able to stand the smell, let alone the taste.

Agreed, the smell and taste is rather obvious.

Fun fact, the only food that doesn’t spoil apparently is honey.

YES they can. I had some fancy olives, and the liquid they were in grew mold and smelled bad. I’m not sure about olives you buy in a jar, but I don’t recommend eating anything that has gotten old.