I have been eating fourthmeal for years only I didn't know it. Looking back now, it never bothered me that I didn't have a good name for my nightly food ritual. Midnight snack was the closest thing except it was much more than a snack and it usually happened at 2 in the morning, not midnight.
So along comes Taco Bell with their forthmeal ad campaign. I don't eat at Taco Bell much anymore, but for whatever reason the name immediately worked for me. It was completely natural and it stuck.
It makes me wonder what else in my life needs a name.