crackˈer noun

1. A person or thing that cracks
2. A thin crisp unsweetened biscuit
3. A colourful tubular package that comes apart with a bang, when the ends are pulled, to reveal a small gift, motto, etc
4. A small, noisy firework
5. The apparatus used in cracking petroleum
6. Something exceptionally good or fine of its type (informal)
7. Someone who illegally breaks into a computer system
8. A poor white (US sl)

crackˈers adjective (informal)

1. Crazy
2. Unbalanced

crackˈing adjective (informal)

1. (of speed, etc) very fast
2. Very good

crack baby noun

A baby born to a mother addicted to the drug crack that has suffered physical damage as a result of being exposed to the drug while in the womb, or is itself addicted

crackˈbrain noun

A crazy person

crackˈbrained adjective

crackdown see crack down on below.

cracked wheat noun

Wheat coarsely ground, boiled and then dried for use as a cereal food, bulgur

crackˈer-barrel adjective (US)

Rural, rustic, of homely philosophy

crackˈerjack or crackˈajack noun

A person or thing of highest excellence (also adjective)

crackˈ-halter, crackˈ-hemp or crackˈ-rope noun (obsolete)

Someone likely to or deserving to be hanged

crackˈhead noun (slang)

A person who uses, or is addicted to, the drug crack

crack house noun

A place where the drug crack is made and consumed

crackˈjaw adjective

Hard to pronounce

crackˈpot noun

A crazy person (also adjective)

cracksˈman noun

A burglar

crackˈ-tryst noun (obsolete)

Someone who breaks an engagement

crack willow noun

A species of commonly grown willow, Salix fragilis, with branches and twigs that snap off easily, found widely in Europe and now the USA

crackup see crack up below.

at the crack of dawn

1. At daybreak
2. Very early in the morning

crack a bottle, can, etc

To open or drink a bottle, can, etc

crack a crib (criminal sl)

To break into a building

crack a joke

To utter a joke with some effect

crack a smile (informal)

To allow oneself to smile

crack credit

To destroy one's credit

crack down on

To take firm action against (crackˈdown noun)

crack it (informal)

To succeed, esp in the seduction of a woman

crack on (informal)

To proceed or go forward quickly

crack the whip

To assert authority suddenly or forcibly

crack up

1. To praise
2. To fail suddenly, to go to pieces
3. To suffer a mental breakdown
4. To distress considerably
5. To (cause to) burst into laughter (informal) (crackˈup noun)

fair crack of the whip

A fair opportunity

get cracking

To get moving quickly