Basically, all you have to do, use pics/gifs/videos (short clips if possible)/emoticons/memes whatever....
Let's try to keep it chained! (like someone posts "Come at me bro" and you respond with a meme/pic/ whatever with a person with a shotgun, verifying that they are coming at the person)
To start things off...Scumbag Brain Meme
http://gyazo.com/932bc0240682d3899a6aa6b8630d2021.png