dingo
noun
[ ˈdɪŋɡəʊ ]
• a wild or half-domesticated dog with a sandy-coloured coat, found in Australia.
• a cowardly or treacherous person.
dingo
verb
• behave in a cowardly manner.
• "he dingoed out because he did not have the nerve"
Origin:
late 18th century: from Dharuk din-gu ‘domesticated dingo’; dingo (sense 2 of the noun) dates from the mid 19th century and alludes to the treachery popularly associated with the dingo.