Originally coined by "Effect2o", FNA is when you are such and excited fan, so excited to see the person you are a fan of, that you tell them you are a fan but misspell and say you are a FNA!
"FNA" also represents a community hosting a group of family friendly creators, named FNA Nation, founded by "Effect2o", and also features "Wild Goat", "Mrs. Samantha", and "Kid-A-Loo".
Comes from mormons, used to describe Friday NightActivity. They use this time so they dont have to deal with the real world of non-belivers. When they hear the other meanings of FNA they will give you a confused look.