ride on someone's/something's coat-tails

ride on someone's/something's coat-tails

or

ride someone's/something's coat-tails

If someone or something rides on someone or something else's coat-tails, they use that person or thing's success to get success for themselves. Note: `Coat-tails' is usually written as `coattails' in American English. Frank did all the work and I rode on his coat-tails. Essentially, we're riding the coattails of the big companies to get new customers. Note: Coat-tails is used in many other structures connected with getting an advantage from someone or something else. The Canadian dollar rode the coattails of the U.S. dollar yesterday. They had come to power on the coat-tails of a popular general whose views on public questions they then ignored.
See also: on, ride