hammer (something) into (one's/someone's) thick skull

(redirected from hammer it into someone's thick skull)

hammer (something) into (one's/someone's) thick skull

To commit some piece of information into one's or someone else's long-term memory, especially through intense repetition. How many times do I have to hammer it into your thick skull? Do not drive my car unless I give you permission first! I've just been trying to hammer these formulas into my thick skull for the big test tomorrow!
See also: hammer, skull, thick