get (something) into (someone's) thick skull(redirected from get into their thick skulls)
get (something) into (someone's) thick skull
To make someone or oneself acknowledge, accept, or understand something when they are or are being obtuse. Look, just get it into your thick skull: 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 skull that I want to break up.