Dump Ice Cream Bar is a frozen dairy product sold in 24/7 stores all across San Andreas in Grand Theft Auto: San Andreas, and Fidl stores all over Vice City in Grand Theft Auto: Vice City Stories. Each pack contains 12 ice cream bars, according to the box. However, the player cannot buy any packages.
The name is slang for excrement, as implied by the color of the logo, another example of Rockstar's crude humor.
The name "Dump" on the other hand is also used as a term for garbage.