The word "yakka" refers to hard work or labor done to accomplish a task. It implies putting in effort and energy to get something done. Full definition
It was hard yakka in mainstream beer at Foster's with Victoria Bitter and Carlton Draught at a time when Woolworths and Coles were expanding their liquor retailing businesses. (afr.com)
After weeks of hard yakka — carrying decent loads, pulling trailers and providing transport for weekends away — the Amarok finally had a chance to break through the tedium last month during a de-toured return trip to Sydney. (motoring.com.au)
The NZ Blu - ray of the restoration of Geoff Murphy's 1983 Utu is a superb example of someone doing the hard yakka to get a film back to a point far beyond what was presented to us by nervous producers and unthinking international distributors way back when. (sensesofcinema.com)