What does this idiom mean: get cracking? Does it mean "hurry up"?

[Rich7]

Test No. incompl/advan-65 "What a Cracker", question 6

For goodness' sake hurry up because if we don't ......... cracking soon we'll miss the bus.

(a) find
(b) get
(c) use
(d) put

Test No. incompl/advan-65 "What a Cracker", answer 6

For goodness' sake hurry up because if we don't get cracking soon we'll miss the bus.

Correct answer: (b) get

Your answer was: correct
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does this mean "to hurry"?

[Torsten]

Yes, to get cracking means to start to be active or to hurry up.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Guest]

[Torsten]

Get cracking means hurry up while fire away is an invitation to start asking questions.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary