Acronym for the term "grown up but not". Used to refer to doing something adult at the same time as something your 10-year old self would have done. Also used when you are doing something kid-like in an attempt to avoid adult responsibilities. Or when you're technically an adult but really have no idea what you're doing.

1. The default beliefs installed when you were a child.

2. An unexamined position you absorbed from your environment growing up.