tipster
tips·ter
noun
1.
one who sells advice about gambling or speculation (especially at the racetrack)
Origin
* From tip (etymology 5) + -ster.
Related words
Broader terms
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.