Top Definition
Someone who is addicted or abuses oxycodone 30mg tablets. These pills are commonly referred as jams and are a major problem in the northeastern section of the country especially in Cape Cod Massachusetts. They come usually as either an M30, or an A215. They give a similar feeling to that of heroin
You tht girls a total jamstar look at her pupils.

Im a jamstar, I blow ten perc 30's a day.
by young jamstar March 14, 2010

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