A small quantity of human faeces sculpted into a perfect sphere for use as a projectile.
Origin: In March 2012 during the Pokémon Video Game Championships in Birmingham, UK, the Spanish team were evicted from their hotel after allegedly engaging each other in faecal warfare in the hotel corridors. (Source: Nitendolife website)
A particularly strong kind of Ecstasy / MDMA pill. Pokeballs generally have a reputation of containing a solid dose of pure MDMA -- though not every "pokeball" pill is guaranteed to live up to this expectation, most do.
Pokeballs are thicker than the typical MDMA pill, come in a variety of colors, and usually are stamped with a logo (like a butterfly) on one side and a "pokeball" score on the other side.
when playing 'Pokemon GO' you throw a pokeball at a pokemon and the game freezes so the pokeball which has the pokemon in it doesn't shake and you are forced to restart your game.