A roadhouse is a tavern, inn, or the like, usually located outside city limits. It usually serves barbecue and alcohol for refreshments and possibly has some sort of live entertainment such as live music or exotic dancers. It was the subject of the single "Roadhouse Blues" by the Doors, released on the album Morrison Hotel in 1970.
"Ah, keep your eyes on the road, your hands upon the wheel
Keep your eyes on the road, your hands upon the wheel
Yeah, we're goin' to the roadhouse
Gonna have a real a-good time"
~The Doors, "Roadhouse Blues"
Based on the recent updates to Facebook (March 2013), which make facebook much more image based and image-friendly, facebook is starting to look very similar to tumblr.
tumblr + facebook = fumblr.
Girl 1: "Hey what's up?!"
Girl 2: "Oh nothing much, just on fumblr sharing some cat pictures."