In StarCraft, a term used for players who play all three races: Protoss, Zerg, and Terran. Oftentimes these players will play Random.
The term can have positive or derogatory meaning, as these players generally lack the specific depth of skill and knowledge dude to their superficial understanding of each race; with few exceptions (LiquidTLO).
The term was derived from taking a few letters of each race, 'Pro' from 'Protoss,' 'Ze' from 'Zerg,' and 'Ta' from 'TerrAn,' and pronounced to rhyme with 'Rosetta,' which references the presence of a number of different languages and the ability to unlock the meaning of them.
"Proz." for short.
Q: Do you play Terran, Zerg, or Protoss?
A: I play ProZeTa.
GoSuGamer1: That noob is playing ProZeTa again.
GoSuGamer2: Don't invite him to any more games until he picks a fucking race.