Bellied: A Tank Corp term for being stuck fast owing to a tree-stump, or other obstruction, catching the underside of the tank and so putting the treads out of action. In soft ground this might happen through the tread working their way under the surface.[1]

References / notes

  1. Edward Fraser and John Gibbons (1925). Soldier and Sailor Words and Phrases. Routledge, London p.21.