Noun, South Side Chicago: 1. A $30.00 eighth of cheap weed, invariably containing many seeds and stems; 2. Nick Swisher, player for the Chicago White Sox, who is in possession of both the fire and the passion.
"You pick up some dank tonight?"
"Nah, just a dirty thirty. It's straight, though."
"Fuck yeah! Dirty 30 just doubled to left!"
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