Goblin Big Bosses have a big tent, bigga than the lads’ tents with more skulls on it.
As befits their elevated status, Big Bosses get big tents. They usually get them by taking over the tent of the previous Big Boss. The reason why the previous Big Boss is not in the tent may be because he died in battle, but more likely he’s dead in a ditch, probably near "da drops", with a rather large knife wound in his back.
A status symbol, a show of the Boss’ rising power and a place he can "ang me boots".
As Bosses grow in power, they gain more followers, add more to the tribe’s pile of shiny stuff, and get more privileges - such as their own shack. By the standards of other races, this is still barely a building, but for the Greenskins, it is an impressive sight and one that marks the owner as "goin’ places".