getthroughone'shead (third-person singular simple presentgets through one's head,present participlegetting through one's head,simple pastgot through one's head,past participle(UK)got through one's heador(US)gotten through one's head)
- (idiomatic) Tocome to terms with a fact, a state of affairs, etc. that one was previously unable or refusing to accept.
2017, India Millar,Pearl´s Story:Pearl nodded obediently, pretending understanding. "If Jack can get his back off the bed in the morning, andget it through his thick head that he has to do his share of mucking out and grooming, not just riding the gee-gees, he ́ll be laughing.[…]"
2000, Terry Larson,House of Parrotise:He still couldn'tget through his head that she was interested in him. Outside of Gloria Williams, the little girl next door who suddenly moved away, he couldn't remember anyone who paid that much attention to him.