deathmtn

Doobers!

And yet, those who denigrate this style of game often refer to them as “slot machines, ” implying that randomness rules. The reason for this is that when a player clicks on almost any entity to collect goods or money, reward icons (known in the industry as “doobers”) spill out, slot machine-like, showing the number of experience points, money, and/or goods received.

From Uncertainty in Games.