to give orders to someone; to keep telling someone what to do. Stop bossing me around. I'm not your employee.Captain Smith bosses around the whole crew. That's his job.
Tell someone what to do, give orders. For example, David complained that his older sister was always bossing him around. The use of boss in the sense of "to dominate" dates from the mid-1800s, and around was added a few decades later.
To give someone orders in a forceful and unpleasant way: My older brothers and sisters are always bossing me around. What gives you the right to boss around everyone on the playground?