look up any word, like jamflex:
 
1.
a high quality beer originating in western australia that has an aftertaste of banana and is favoured by australian women, but enjoyed on the whole as it is incredibly awesome.
customer: "can I grab a pot of redback, please, waiter?"
by tiny dancer July 04, 2004
 
2.
Texas Dollar from the Republic of Texas before joining the United States
That will be 5 redbacks.
by greenfox1505 December 14, 2011
 
3.
Alternative form for the word wetneck.
That redback's mom is from Arkansas and his father is from Mexico City.
by JHBennett October 14, 2008