Akin to the seemingly antiquated phrase "Get a room," "Get a Chatroom" should be used openly towards couples, or anyone for that matter, getting a bit too mushy online. Perfect for facebook wall conversations. It can also be used for when your notifications get bombarded because you decided to say "Nice Outfit!" on a friend's picture. This picture then sparked a flirtfest between the picture-poster and another random individual, leaving you to not only get annoyed, but notified! Next time you see this retch-inducing display online, let them know what they should do!
John: Oh baby, you look so hot O_O
Lisa: AwWw, thanks smoochems! I loveeee yOoOoO! Can't wait to see you later, muahhhhhh!
John: YOU can't wait?! You should see me over here!! I'm itching to get off so I can come visit my hunny bunny!
Rudy: Ewww, Get a Chatroom you guys!