Everyone knows ATF officially stands for the Bureau of Alcohol, Tobacco, Firearms and Explosives. But three little letters have room for a lot more mischief than that. Whether you've seen the acronym on a TV crime drama, a video game, or a meme scrolling through your feed, chances are you've wondered what else ATF could possibly mean. So we did what any reasonable person does with free time and a keyboard: we brainstormed a list of funny, ridiculous, and occasionally too-real alternative meaning …