(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.

plural of head-up display

Alternative form of like a chicken with its head cut off

Alternative form of like a chicken with its head cut off

A rare parasomnia in which the subject experiences the auditory hallucination of a loud bang or similar noise inside the head.

(slang, derogatory, Canada, US, vulgar) To be oblivious to the real state of things, from either stupidity or stubbornness.