Bob Barrett or Monunggal (c. 1795 – 15 October 1833) was a notable Awabakal Indigenous Australian from the area around Lake Macquarie and Newcastle, New South Wales.

Not much is known about Barrett's early life, apart from that he was born in the Newcastle or Lake Macquarie region of New South Wales around the year 1795 and is regarded as being part of the Awabakal group of Indigenous Australians.

[2] As a young man he was regarded as powerful and intelligent by members of the British military establishment at the Newcastle penal colony and was utilised in tracking down and capturing escaped convicts around the period of 1817 to 1821.

[1] In 1821, Barrett together with two other well-known Awabakal men in Biraban and Jemmy Jackass (aka Werakata), were assigned to be taken to Port Macquarie to assist in the establishment of a new convict settlement there.

[1] Captain Francis Allman, the first Commandant of the Port Macquarie penal colony, utilised Barrett, Biraban and Jemmy to help establish communication with the local Birpai people and, similar to Newcastle, used to track down and capture escaped convicts.

They encountered a drunk Aboriginal man of the Eora clan named Borondire (aka 'Dirty Dick'), whom they dragged to the shore near Bennelong Point and beat to death with waddies.

Barrett, who was conspicuous in his signature outfit of an old soldier's jacket, and two of his associates were soon apprehended and found guilty of murder by a hastily convened coroner's court.