The Breaking of Bumbo is a 1970 British comedy film directed by Andrew Sinclair and starring Richard Warwick, Joanna Lumley, Jeremy Child and Edward Fox. The screenplay was by Sinclair, a former Coldstream Guards National service officer, adapted from his 1959 novel of the same name.

Andrew Annandale Sinclair FRSL FRSA was a British novelist, historian, biographer, critic, filmmaker, and a publisher of classic and modern film scripts. He has been described as a "writer of extraordinary fluency and copiousness, whether in fiction or in American social history".