english
1
general::
Not at all, not in the least, as in She was not a bit interested. [Mid-1700s]
American Heritage Idioms
2
general::
Phrase(s): not a bit none at all; not at all. • Am I unhappy? Not a bit. • I don’t want any mashed potatoes. Not a bit!
McGrawhill's American Idioms And Phrasal Verbs