Wiktionary
a. (context Australia idiomatic English) Extremely busy. adv. (context Australia idiomatic English) At maximum capability, intensity, or speed. alt. (context Australia idiomatic English) At maximum capability, intensity, or speed.
Wikipedia
Flat Chat is the second compilation album from the Australian rock band, Midnight Oil. It is a collection of their heavier rock songs, which gave them their reputation. Flat Chat peaked at No. 21 on the ARIA Albums Chart.
The title is taken from a lyric in their 1982 song, " Power and the Passion". The Australian slang expression flat chat is used for "at the limit of one's powers or resources" or "working or moving as fast as possible".
Flat Chat is an Australian sitcom that screened on the Nine Network in 2001.
Flat Chat tells the story of two very different women, a socialite and a bogan, whose lives change when their circumstances are reversed. Socialite Claire Jansen is forced to sell her mansion when her husband dies, leaving her flat broke. She moves into the stables when the house is bought by a rich but vulgar man and his new young wife who is unused to the ways of society. The two women form an unlikely alliance as they struggle to adjust to their new circumstances.