Hard to starboard means that the ship's rudder is turned hard to the right moving ship to the right. Leaving it hard to starboard will results in the ship going in circles. Typically the order is...
Mean can mean you are being rude or in math terms it is adding a set of numbers then dividing by the total amount. ex. If your numbers are 1,2,and 3 add them to get 6 and divide by 3. You get 2.