I'm a native English speaker and it doesn't mean anything to me as-is either. He probably meant "flat-out", which is an intensifier of sorts. I try to encourage all of my pieces to achieve the best they; they're my team, and I don't really despise any of them.
Witch piece do you out despise?
Ok... so we officially have ran out of ideas:
We have a thread for: Favourite piece \ Least favourite piece \ Piece that makes you ill \ Piece you dispise... Where does it end?
WELL???