Noun
swapper (plural swappers)
One who swaps.
(computing, demoscene) A group member responsible for acquiring and distributing new software releases.
The Rococo Swapper has the unusual property of self-destructing at will, in lieu of moving, provided it is not at the same time immobilized, with the effect of taking one enemy piece alongside it. Source: Internet
Unlike the game of Renaissance described above, Rococo has a similarly named Swapper piece that moves like a queen, but trades places with the enemy it runs up to, a full queen's move away. Source: Internet