I suspect not

I suspect not

An expression of vague denial or negation. A: "Is Tom coming?" B: "I suspect not—it's getting pretty late."
See also: not, suspect
Farlex Dictionary of Idioms.
See also:
  • I suspect so
  • at large
  • pull the strings
  • do something on sight
  • at this point in time
  • go a bundle on
  • take (someone or something) back to (someone or some place)
  • take back to
  • come up with the rations
  • acknowledge to be right