not one/a jot

not a jot

Not even a tiny or the smallest amount (of something). I worked all of that overtime and received not a jot of extra cash for my efforts. Look at him—there's not a jot of shame in his eyes for what he's done. A: "Did you get any help on your assignment from the study group?" B: "Not a jot. They were all too busy gossiping."
See also: jot, not
Farlex Dictionary of Idioms.

not one/a ˈjot (or ˈtittle)

(informal) not even the smallest amount: There’s not a jot of truth in the story. It seems that his divorce has not affected him one jot. She doesn’t seem to care a jot what I do.
See also: jot, not, one
Farlex Partner Idioms Dictionary
See also:
  • not a jot
  • not an iota
  • iota
  • aint
  • ain't
  • not for a instant
  • by no means
  • not by any means
  • (I) hope not
  • hope not