adventurer adviser announcer annunciator authority betrayer betting ring bettor boneshaker canary cardshark cardsharp cardsharper channel communicant communicator compulsive gambler crap shooter dopester enlightener expert witness fink gambler gamester gossipmonger grapevine hazarder informant information center information medium informer interviewee monitor mouthpiece nark newsmonger notifier petty gambler piker player plunger press public relations officer publisher punter radio reporter sharp sharper sharpie snitch source speculator spokesman sport sporting man sportsman squealer stool pigeon talebearer tattler television teller tinhorn tout touter venturer wagerer witness