Tumbledung \Tum"ble*dung`\, n. (Zool.)
Any one of numerous species of scaraboid beetles belonging to
{Scarabaeus}, {Copris}, {Phanaeus}, and allied genera. The
female lays her eggs in a globular mass of dung which she
rolls by means of her hind legs to a burrow excavated in the
earth in which she buries it.
[1913 Webster]