Well, here's the funny thing...technically to most people it stands for Alcohol, Tobacco and Firearms and is a federal agency. However, for me it's Acquire the Fire, which is a sort of concert/motivational speech for Christian youth that lasts two days. I went something like four, five times in high school and it didn't improve one single solitary facet of my faith, except perhaps to make me a little less gullible to hype.
This guy's got some other funny stuff too on his channel.