Chunka-saurus

(Noun) A rare creature often found in the midst of the Australian outback, usually carrying a Super Shorty Shotgun or an F90 Assault Rifle. In rare occasions, can be found carrying an M249 Light Machine Gun.
A favoured pet of the SASR, frequently referred to as 'Gridlock', or Chunka-saurus Rex.

Look! There goes a Chunka-saurus!
That Chunka-saurus is holding a gun.