RING IN

{v. phr.}, {informal} 1. To bring in (someone or something) from the outside dishonestly or without telling; often: hire and introduce under a false name. * /Bob offered to ring him in on the party by pretending he was a cousin from out of town./ * /No wonder their team beat us; they rang in a professional to pitch for them under the name of Dan Smith./ 2. To ring a special clock that records the time you work. * /We have to ring in at the shop before eight o'clock in the morning./