ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
Etymology: tumble (I) + bug
: any of various scarabaeid beetles (as members of the genera Scarabaeus, Canthon, Copris, or Phanaeus ) that form globular masses of dung which they roll and bury in holes excavated in the ground, in which they lay their eggs, and which serve as food for the larvae