Answer: A popup menu is a list of options that “pop up”. This often happens due to a right-clicking of the mouse.

Right-click over the image below to view a popup menu much different than the one pictured. (Because the picture is more than a decade old.) If you wish to choose an option from the popup menu, left-click on the option you wish to choose. Click somewhere else to make the menu go away. In practice, try to choose an empty area of the web page or program you are viewing to cancel a menu.