Definition:
Right clicking is the term used to tell the user to click the button on the right side of the mouse, rather than the most commonly used left button. Right clicking has one purpose - to produce a shortcut menu with quick options specific to the object that is clicked on.
Best practice suggests that the right mouse button be clicked using the second finger. This keeps the hand in the correct position while using the mouse and can help to avoid repetitive stress injury - a very common, and painful problem for computer users.
Examples:
Mary hovered her mouse over the picture on the slide and right clicked with the mouse. This produced a shortcut menu of options that could be applied to the picture.