(UK, Australia, informal, idiomatic) To frustrate, infuriate, irritate or disturb someone.

plural of flat-headed cat

Prionailurus planiceps, a small wild cat patchily distributed in the Thai-Malay Peninsula, Borneo and Sumatra.

plural of head-up display

Alternative form of like a chicken with its head cut off

Alternative form of out of one's mind

Insane, crazy. / Temporarily mentally unstable; very distressed. / Under the influence of drugs.

(computing) An addressing system of hard drives where the hard drive is addressed by its cylinders, heads, and sectors.

(idiomatic) To influence someone in a manner that significantly changes his or her behavior. / (idiomatic) To attract someone's romantic interest.

simple past tense and past participle of scratch one's head