Top Definition
a bag of marijuana that is considered a 50 bag. The amount of marijuana varies based on the quality. (For further understanding see "Dime Bag" or "Nickel Bag."
The 50 dollar bag, we call that half century.

Yo, I went to Jamaal this morning and asked for the usual, half century, and he gave me 3.0g.
by Idea April 11, 2007

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