Cunning Action is a Rogue feature gained at level 2 in D&D 5e. Starting at 2nd level, your quick thinking and agility allow you to move and act quickly.
Starting at 2nd level, your quick thinking and agility allow you to move and act quickly. You can take a bonus action on each of your turns in combat. This action can be used only to take the Dash, Disengage, or Hide action.