A hotbar is a
GUI (Graphical User-Interface) that has elements (images, buttons, slots, etc...) that allow the user to
access to command, item, control, or other
content that's offered by the program hosting it.
(Example: In Minecraft, SMM(2), and The Sims, you have a hotbar.)
The hotbar consists of: Magikoopa,
Block, ?-Block, Coin, and more.
"I have two eggs, and three rotten flesh in my hotbar."
"There's an option to
speed up time in The Sims."
(This can be applied to many more games or applications that include up-
front controls.)