not at all
= don't mention it (see mention v. 1 c).
| 1936 Wodehouse Laughing Gas ii. 19, I was not-at-alling and shoving the handkerchief up my sleeve again. 1963 ‘E. McBain’ Ten plus One vii. 88 ‘Well, thank you,’ Carella said. ‘Not all. My pleasure,’ Richardson answered. 1973 J. Burrows Like an Evening Gone i. 13 She..pretty well knocked him flying... ‘So sorry.’ ‘Not at all.’ |