noun
A person paid to endorse a product while pretending to be impartial.
(derogatory) Any person enthusiastically endorsing a product; especially, one who is getting paid for the endorsement.
An accomplice at a confidence trick during an auction or gambling game, such as an accomplice of the seller who bids to drive up the price.
(gambling) A house player in a casino.
verb
(derogatory, intransitive, transitive) To promote or endorse in return for payment, especially dishonestly; sometimes extended sarcastically even to those not paid but strongly biased in favor.
verb
To put under cover; to sheal.
verb
(UK, obsolete, dialect) To shell.