the slammer
From Longman Dictionary of Contemporary Englishthe slammerthe slammerinformalPRISON prisonin the slammer He had to spend his twentieth birthday in the slammer. → slammerExamples from the Corpusin the slammer• Life in the slammer wasn't too bad for Bob Mitchum.• So heinous, in fact, that it carries a penalty of three months in the slammer.