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n. Informal One who sells tips or information, as to bettors or speculators.

n. 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.

n. A person specially employed in furnishing tips or secret information to persons interested, for betting or speculative purposes, in the issue of horse-races, the rise and fall of stocks, etc.: distinguished from a tout, who may be in the tipster's employment.

n. one who sells advice about gambling or speculation (especially at the racetrack)

"The tipster is later identified as Trevor Graham, a sprint coach whose clients include Marion Jones, Tim Montgomery and Justin Gatlin."

advisor    consultant    adviser   

racetrack tout   

informant   

emailer    diptych    bookmaker    treatise    chattin    proofed    nine-one-one    letters?'    `one'    they