From dictionary.com
shill
Noun
1.a person who poses as a customer in order to decoy others into participating, as at a gambling house, auction, confidence game, etc.
2.a person who publicizes or praises something or someone for reasons of self-interest, personal profit, or friendship or loyalty.
Verb (used without object)
3. to work as a shill: He shills for a large casino.
Verb (used with object)
4. to advertise or promote (a product) as or in the manner of a huckster; hustle: He was hired to shill a new TV show.
World English Dictionary
slang a confidence trickster's assistant, esp a person who poses as an ordinary customer, gambler, etc, in order to entice others to participate
Slang Dictionary
someone planted in the crowd to urge others to buy something, participate in something, etc. : The guy's a shill! Don't fall for this setup!
to advertise for something; to give a sales pitch for something. : Four stars of an old television show were there shilling for a major computer firm.
