1 definition by Ca-ca-ca-carmen

Top Definition
In the state of Montana (perhaps elsewhere, I'm not sure) dirty 30 refers to a 30 pack of Keystone Light. Cheap shitty beer that all the hicks LOOVVEEE.
"Dude, dirty 30 only 13 bucks at Orange Street Market!"
by Ca-ca-ca-carmen September 01, 2005

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