There are a couple of ways to determine if eggnog is terrible: if it looks lumpy, has a funny smell, or has changed color. If it does exhibit any of these signs, it’s time to discard it and get some replacement. Luckily, there are easy ways to determine if eggnog has wrong bad. First and foremost, let’s talk about the smell. Take a smell of the liquid after opening the carton or container. If it begins to smell rotten, it is past its prime and should be discarded.
The next step is to examine the appearance.