"one who acts as a decoy for a gambler, auctioneer, etc.," 1916, probably originally circus or carnival argot, probably a shortened form of shillaber (1913) with the same meaning, origin unknown. The verb is attested from 1914. Related: Shilled; shilling.
This man shilled and bid for an expensive carpet during the auction in order to drive the price up
Shiism
shiitake
Shiite
Shikoku
shiksa
shill
shillelagh
shilling
shilly-shally
Shiloh
shim