As quickly as possible, lying down

Wikipedia Word definitions in Wikipedia
Flat Out (foaled 21 March 2006) is a retired American Thoroughbred racehorse and prospective breeding stallion. Bred in Florida, he won nine of his twenty-nine races in a track career which lasted from November 2008 until November 2013. He produced many ...

WordNet Word definitions in WordNet
adv. in a blunt direct manner; "he spoke bluntly"; "he stated his opinion flat-out"; "he was criticized roundly" [syn: bluffly , bluntly , brusquely , roundly ] at top speed; "he ran flat out to catch the bus"; "he was off down the road like blue murder" ...

Wiktionary Word definitions in Wiktionary
1 (&lit flat out English) 2 complete, total, downright. 3 Very busy. 4 (context Australian English) lazy, sleeping. adv. 1 (context idiomatic English) At top speed. 2 (context idiomatic English) bluntly, no holds barred, totally, outright. alt. 1 (&lit ...