transcription, транскрипция: [ ˈflat-ˌau̇t ]
adjective
Date: 1906
1. : being or going at maximum effort or speed
2. : out-and-out , downright
it was a flat-out lie
FLAT-OUT
Meaning of FLAT-OUT in English
Merriam-Webster's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003