Definition of mulgas:
(n) :
(Australia) Any of a number of small acacia trees, especially Acacia aneura, forming dense scrub in dry inland areas of Australia.
(n) :
(Australia, preceded by definite article) Any region where mulga is the predominant vegetation.
(n) :
(Australia, colloquial, in combination) The outback.
(n) :
Something made from the wood of a mulga tree.
(n) :
Ellipsis of mulga wire (“a message or story transmitted through an informal gossip network, especially one containing false information”). [(Australia, New Zealand) An informal gossip network, especially in a rural area such as the outback; also, a component in the network (either a person or an imagined wire).]