An extensive search (12 minutes over a cup of coffee) indicates that the "Bung Method" was first recommended in the early 1900s for obstreperous boys - place 'em in a barrel, put in the bung, and let them out when they are 18. This is no longer recommended.
My "bung method" was used to create my garden. Neighbour Jean gave me cuttings and told me to "bung them in". So I did, and they mostly grew: a hillside of white Federation daisies, plus French lavender, fuchsias, wormwood, salvias, deciduous hibiscus, grapes, roses ... Jean's glorious rose garden was grown exclusively from bits other people had pruned off. Jean "bunged" them in along the front of her house.
