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1. Any amount of a non-specific drug (commonly weed), that appears to be acceptable, but is so bad that upon ingestion you realize it was not worth the time, money and effort. There is a probability a sizable portion will go unused.

2. Can be referred to a person you had high hopes for but let's you down.
"Man! This weed is a bad bag of dope! I aint even high! I'll bag the rest up and sell it to some duck."

Lil Wayne fell off like a bad bag of dope! Autotune and shit!
by AlexanderK June 30, 2010
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