As tough, hard, or inflexible as a piece of rock. / (bodybuilding) With muscles developed and toned to a high degree, especially the muscles of the abdomen.

(Australia, New Zealand, colloquial) hard work

Alternative spelling of hardheaded

A thin horizontal bony plate of the skull, located in the roof of the mouth.

(US) An alcopop resembling lemonade.

(two-up) A crooked organiser of a two-up game, who would cheat players out of their money.

(phonetics) The "c" sound pronounced /k/, as in "cat" and "cabin", as distinct from the soft c, pronounced /s/, in "cent", "center" and "circuit".

A verge to the side of a highway, which should be used only in case of an emergency (especially on a motorway)

(phonetics) The plosive /g/ sound in "get", "log" and "give" as distinct from the soft g in "gem", "giraffe", "lodge" and "generation".

(simile, idiomatic) Very unsympathetic; callous / (simile, idiomatic) Able to endure difficulties; tough