NOT SO DUSTY, adv. phr. (common).A term of approval; not so bad; so-so.
1854. F. E. SMEDLEY, Harry Coverdales Courtship, ch. xlii. Why is the fact of the contents of a backgammon-board having been thrown out of the window like Miltons chef dœuvre? Do you give it up? Because its a pair odice lost. NONE SO DUSTY thateh? for a commoner like me?
1884. HAWLEY SMART, From Post to Finish, p. 28. Well, my dear, said Butters in the most patronising way, I know Im NOT SO DUSTY, and if it wasnt for my disgusting weight Id pretty soon let em see at Newmarket what I can do.