1. slang Short for "tequila slammer," a cocktail typically consisting of tequila, lemon or lime juice, and sparkling white wine, mixed together by slamming the bottom of the glass on a hard surface to mix the ingredients together and cause the sparkling wine to foam up. I remember drinking slammers after dinner, and then it all gets blurry after that.

2. In the game of pogs or milk caps, the heavy piece (often plastic or metal) that is thrown down on the stack of discs during gameplay. Sweet slammer, dude! Is that Sonic the Hedgehog on there?