A sudden, intense, loud sound, as made for example by cymbals.

An automobile, airplane, or other vehicle accident.

(computing) A malfunction of computer software or hardware which causes it to shut down or become partially or totally inoperable.

(finance) A sudden large decline of business or the prices of stocks (especially one that causes additional failures).

(informal) A comedown from a drug.

(collective) A group of rhinoceroses.

(ecology) A sudden decline in any living form's population levels, often leading to extinction.

(textiles) A type of rough linen.

(intransitive) To collide with something destructively, fall or come down violently.

(transitive) To cause something to collide with something else, especially when this results in damage.

(transitive) To hit or strike with force

To make a sudden loud noise.

(transitive, slang) Short for gatecrash.

(transitive, management) To accelerate a project or a task or its schedule by devoting more resources to it.

(intransitive, slang) To make or experience informal temporary living arrangements, especially overnight.

(transitive, slang) To give, as a favor.

(intransitive, slang) To lie down for a long rest, sleep or nap, as from tiredness or exhaustion.

(intransitive) To experience a period of depression and/or lethargy after a period of euphoria, as after the euphoric effect of a psychotropic drug has dissipated.

(computing, hardware, software, intransitive) To terminate extraordinarily.

(computing, hardware, software, transitive) To cause to terminate extraordinarily.

To take a sudden and severe turn for the worse; to rapidly and catastrophically deteriorate.

Quick, fast, intensive, impromptu.