Third-person singular simple present indicative form of wrap one's head around

An inflated ego, an exaggerated belief in one's own importance. / (idiomatic, usually humorous) The brain, as opposed to the penis, little head; rational thought, as opposed to lust.

(idiomatic, rare) Anything mindless; something that does not involve thinking.

Alternative form of headfirst

(idiomatic) To act with pride; to be proud in a positive way.

(informal) In a frantic, disorganized manner.

(idiomatic) A significant amount of energy, vigour or momentum, sufficient to make progress or succeed in a task.

(idiomatic) To take up an issue with another person's boss or other superior rather than beginning or continuing to deal with the original person. / (idiomatic) To escape someone's comprehension.

Alternative form of headfirst

With the head first or foremost.