Updated October 21, 2014.

Definition:

Street term for an individual who is given a drug early in the day by a dealer and then spreads the word about the drug throughout the rest of the day.

This term is one of more than 2,300 street terms that refer to specific drug types or drug activity compiled by the White House Office of National Drug Control Policy.

Examples: Whenever he got a supply of potent cocaine, he always used a tester to spread the word.