What you say when you try really hard for something and get a crappy prize.
The phrase comes from the SNES game "Super Mario RPG". When you find all the hidden question blocks, a treasure chest in Monstro town counting down how many you've found tells you the saying.
Person 1: Great job! You just ran the length of the entire Earth! Have a ribbon!
Person 2: Wow, you've found them all.