knit your brows

knit (one's) brow(s)

To furrow one's brow, often due to worry or confusion. Whenever there was a problem, my dad would sit in his favorite chair, knit his brow for a while, and then announce that he had a plan. When I asked Bill about what happened, and he knit his brows, I knew I was about to hear some bad news.
See also: knit
Farlex Dictionary of Idioms.

knit your ˈbrows

frown (= move your eyebrows together), to show that you are thinking hard, feeling angry, etc: She knitted her brows, trying to think how she could have spent so much money in one week.
See also: brow, knit
Farlex Partner Idioms Dictionary
See also:
  • knit
  • knit (one's) brow(s)
  • knit brow
  • knitting
  • knit (one's) eyebrows
  • sweat of brow
  • the sweat of (one's) brow
  • by the sweat of (one's) brow
  • by the sweat of brow
  • by the sweat of one's brow