To say "not eating meals on time" in Engpsh, you can say "not sticking to a regular meal schedule" or "skipping meals." Here are a few examples:
I've been so busy lately that I've been skipping meals.
I'm trying to get back on track with my meal schedule, but I keep not sticking to it.
I know it's not good for my health, but I have a tendency to not eat meals on time.
It's important to maintain a regular meal schedule and eat at regular intervals to ensure that you are getting the nutrients that your body needs. Skipping meals can lead to hunger, fatigue, and other negative health effects.