slammer

Short definition from Wiktionary

Noun

1. 1
   One who, or that which, slams.
2. 2
   Jail, prison.
3. 3
   A tequila cocktail that is slammed onto a surface to induce fizzing.
4. 4
   One who takes part in slam-dance.
5. 5
   One who competes in a poetry slam.
6. 6
   In the game of Pogs, the heavier piece used to strike the stack of counters.
7. 7
   A slam-door train.
8. 8
   A fraudster who carries out slamming (fraudulent changes to a customer's service).