Best played upside down. On the floor. While eating a cheeseburger.
Note: Real words only. For each word, either the entire word has been rotated 180 degrees (ie. "sǝǝɹƃǝp") OR just each letter has been rotated 180 degrees (ie. "pǝƃɹǝǝs"). You have to figure out which it is, and then just type the word in its sober state.