A style of prepared coffee invented in Australia.
Flat by comparison to a cappuccino and with no chocolate sprinkles of any kind, it bears some similarities to the Australian version of a cafe latte (the American cousin of the extraordinarily dissimilar Italian caffe latte). I always have a chuckle at the Australian/American spelling because it combines French coffee with Italian milk -- whoever invented that must have been really fussy!
The flat white differs from an Australian cafe latte by aspiring to plainness of presentation. It has a thinner layer of froth, and is generally not decorated with hearts, Christmas trees or other ornate patterns.