This is a great exercise to work your whole body.
First put one end of barbell in a corner and load up the other end.
Perhaps put a towel down the floor end as you don't want to put a
hole in your gym floor.
1. Start in squat position holding the heavy end of barbell at your
shoulders
2. Push up with your legs and your shoulders while bringing the
other arm up to take the load to the other arm.
3. Squat down, then push back up while bringing the other arm up
and so on.
You can go quite heavy with this exercise but not so heavy that you
lose form and out of control.