In the early hours of April 2, 2010, most of /b/ was complaining about what they thought had been an April Fool's joke: the facebook add on to posting. A different anonymous however, started an anti joke thread. One such mentioned was the joke in the picture. "A man walks into a bar. He's an alcohol and it's destroying his family." Once noticed, users began posting reaction faces and creating their own an alcohol jokes. An alcohol can be used to describe anything harmful, or stupid, or even parody an hero. Some other uses were "Why did the chicken cross the road? Because he's an alcohol." Others were more complex and even involved combos, such as "I was in the kitchen when my an alcohol dad yelled 'AWW BALLS'…" you should know the rest.
It's up there to compete with the likes of an hero, as it is so versatile and easily used.
Most likely, some will force the meme and it will be dropped like every other recent meme.