[ noun ] one who sells advice about gambling or speculation (especially at the racetrack) <noun.person>
Tipster \Tip"ster\, n. [Tip a hint + -ster.] One who makes a practice of giving or selling tips, or private hints or information, esp. for use in gambling upon the probable outcome of events, as horse races. [Webster 1913 Suppl.]
The tipster cooperated with police because of growing competition among dealers in the North Camden neighborhood, the worst drug area in the city, Gallagher said.
An unidentified tipster who saw NBC-TV's "Unsolved Mysteries" in the United States on Dec. 28 contacted police Tuesday, said Detective Sgt. Donald Brooks, of the State Police.
"Today the governor is a Los Angeles commuter and a traffic tipster," said anchorman Bill Zorn of KNX-AM, one of three radio stations to broadcast Deukmejian's live traffic reports.
They also said they had no clues to the identity or motives of the anonymous tipster.
The only ones who tried were an anonymous tipster who complained to authorities that the boy was not getting needed medical care, and Hanif's 5-year-old cousin, who lived in the same building and was Hanif's best friend.