Not a bit of it! - Idioms by The Free Dictionary
not a bit of it!
not a bit of it
Not at all or in any way. Primarily heard in UK. A: "Do you mind if I tag along this afternoon?" B: "Not a bit!"
not a ˈbit of it! (British English, informal) used for saying that something that you had expected to happen did not happen: You’d think he’d be tired after the journey but not a bit of it! ♢ I thought she would be glad to see him but not a bit of it — she made some excuse and left as soon as he got here.