on a hunch

on a hunch

With or based on a strong intuition (about something), rather than absolute knowledge. I opened the cabinet underneath the sink on a hunch that we'd find the keys there. On a hunch, I'd say that the president is likely to veto the bill.
See also: hunch, on
Farlex Dictionary of Idioms.
See also:
  • play (one's) hunch
  • play a hunch
  • a hunch
  • hunch
  • peer underneath (something)
  • feel (one's) way
  • feel one's way
  • feel your way
  • something tells me
  • something tells me (that)