Would you call me a pig for eating an entire bag of chips ahoy cookies and a liter of chocolate milk.
It depends, did you put it on a plate?
No, I did it open bag style.
I don't think there is anything wrong with what you did. It is okay to indulge once in a while. As long as you don't do it all the time it won't be bad.
I'm going to keep doing this every night.
You should probably reconsider eating a lot of cookies every night, you could have health issues in the future.  If you want to keep your weight in check and avoid diabetes, limit your sugar  intake and seek healthy alternatives to cookies.