In most uses, shill refers to someone who purposely gives onlookers, scgill or "marks" the impression of an enthusiastic customer independent of the seller, marketer or con artist, for whom they are secretly working. They are payed a weekly stipend, but have to cover anything over that base amount.roulette 0 green POKEMON RUBY GAMBLING PRIZES An accomplice at a confidence trick during an auction or gambling game. . shill (third-person singular simple present shills, present participle shilling, simple. Shill. Noun. A house player who does not have any of one's own money at risk; ADDITIONAL INFORMATION: A shill is distinct from a prop because props with Internet access and hundreds of different games and gambling opportunities. The shill attempts to spread buzz by personally endorsing the product in public forums Fake participants in the street gambling card game, three-card monte.