What is In The Slammer?
1.
In jail; behind the locked doors of a prison.
1) Tomas spent a few years in the slammer for robbing a grocery store.
The phrase refers to the closing of a door. When a door is 'slammed' it means that it was closed with great force.
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1.
what would Samuel L. Jackson do?
guy: look there's a man and his wife robbing a diner, W.W.S.L.J.D?
guy 2: he would kick ass and..