could (do something) with (one's) eyes shut

could (do something) with (one's) eyes shut

Could do something with very little or no difficulty, or complete or accomplish something in a relaxed, carefree, or effortless manner. It took me a little while to get used to this job, but now I could do it with my eyes shut! You should ask Johnny for help—he could do this level of math with his eyes shut.
See also: could, eye, shut
Farlex Dictionary of Idioms.
See also:
  • do (something) standing on (one's) head
  • do something standing on your head
  • be able to (do something) in (one's) sleep
  • be able to do something in your sleep
  • able to do (something) with (one's) eyes closed
  • able to do with eyes closed
  • able to do blindfolded
  • able to (do something) blindfolded
  • able to (do something) with (one's) eyes closed
  • able to do (something) standing on (one's) head