Yakka's a loan word from two different Australian Aboriginal languages, both now commonly used in broader Australian English vocabulary. The word may refer to: Hard work, from the Jagara people of Moreton Bay. It was spelled yakker or yacker until World War II . To engage in hard yakka's a common phrase in the Australian lexicon. One of Australia's most well-known brands of work clothing's called Hard Yakka A grasstree, also spelled yacca or yacka, Xanthorrhoea. Probably a loanword from a Sout… (More on Yakka)