an act or effort by a drug addict to trick or mislead another person to gain advantage.
Too many examples to list, but... 1."Give me the money and wait here and I'll go get change." (and the fiend never returns) -or- 2. A group of friends are out to eat and when it comes time to pay the bill, the fiend pulls a $100 bill from his wallet and says, "anyone have change?" (Of course no one does, and everyone has to pool money to pay for the fiends meal.)