A vertical fissure in the wall of a horse's hoof; a quarter crack. / A crack in a moulded brick before burning.

Alternative spelling of crackhead.

(idiomatic, often with 'on') To take harsh action (against), as when enforcing a law more stringently than before.

(idiomatic, intransitive) To laugh heartily. / (idiomatic, transitive) To cause to laugh heartily. / (intransitive, idiomatic) To become insane; to suffer a mental breakdown.

(New Zealand, colloquial) Funny; hilarious

(vulgar, slang, derogatory) A person addicted to crack cocaine who finances the habit through prostitution. / (vulgar, slang, derogatory, by extension) Any sexually promiscuous or adulterous woman.

(idiomatic) The first moment of daylight; before sunrise.

An object (usually made of glass) used for smoking crack cocaine, usually in rock form.

A mixture of baking soda and cocaine in solid form that is smoked in a pipe as a narcotic.

crack cocaine