https://techcrunch.com/2018/02/06/elon-musk-says-spacex-to-focus-on-bfr-following-falcon-heavy-launch/

SpaceX CEO Elon Musk said at a press event for the just-launched Falcon Heavy that SpaceX will now begin focusing in earnest on ‘BFR,’ the code name for its next big space launch vehicle. BFR (aka ‘big f*cking rocket’ in case you lack imagination) will be designed to be a vehicle capable of using a single stage to make it all the way to orbit, with fully loaded tanks.

Musk said that BFR might be ready for “short hopper flights with the spaceship part” of the rocket by maybe next year. These will essentially be flights of “increasing complexity,” with the intent being to go out of Earth’s atmosphere and then “come back in hot to test the heat shield,” because BFR’s primary purpose will require it to survive planetary entry, on Earth, Mars and beyond.