wrap one's head around

verb2

1. •
   (informal, figurative) To come to a good understanding of.

   • It is sometimes mind-boggling to try and wrap one's head around all the possible information sets which one should try to address. — 1978
2. •
   (informal) To crash into (something, especially a pole) messily and fatally while travelling in a motor vehicle.

   • “Some crazy young bastard wrapped his head around a pole.” — 2011