out-and-out

out-and-out

Complete; utter; absolute; thoroughgoing. Always used as a modifier before a noun. Their lead singer is an out-and-out genius when it comes to writing music! That's an out-and-out lie! I demand you take that back!
Farlex Dictionary of Idioms.

out-and-out

COMMON You use out-and-out before a noun in order to emphasize that someone or something is very clearly and definitely the kind of person or thing mentioned. His investment has proved to be an out-and-out winner. This was almost certainly an out-and-out lie.
Collins COBUILD Idioms Dictionary, 3rd ed.

out-and-out

mod. complete or total; blatant. Don’t be such an out-and-out stinker!
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • blink-and-you-miss-it
  • par excellence
  • round robin
  • a round robin
  • side by side
  • eleventh hour
  • the eleventh hour
  • heads I win, tails you lose
  • black market
  • the black market