This Term Refers to something going awry, or Something going horribly wrong.
A perfect example is the Fairly OddParents Episode, Hard Copy, when Wanda Wishes up a Engine, and a Soda, for his Starfighter, while Evading Dark Laser, a Character Parodying Dark Vader from Star Wars, but it seems that the machine had ran out of Toner, and had made half of both of the engine, and the soda.
Wanda:"One Star Fighter Engine, and a soda coming right up!"
*Engine and soda are poofed*
Timmy:"Hey! Half a soda? Half a Engine? What Gives!?"