get (something) into (one's) thick head

get (something) into (one's) thick head

To make one acknowledge, accept, or understand something, especially when they are being obtuse or willfully ignorant. Look, just get it into your thick head—we're moving, and there's nothing that's going to change that now. I don't know how else to get it into her thick head that I want to break up. I don't know why I'm having such a hard time getting this equation into my thick head.
See also: get, head, thick
Farlex Dictionary of Idioms.
See also:
  • get (something) into (someone's) thick skull
  • get (something) through (someone's) thick skull
  • get through thick skull
  • a bit obtuse
  • (as) thick as a short plank
  • plank
  • thick as a short plank
  • be (as) thick as a brick