get cracking

Từ điển WordNet v3.1 - WordNet Dictionary

verb

start to be active
- Get cracking, please!
• Syn:
bestir oneself, get going, get moving, get weaving, get started, get rolling
• Hypernyms:
get down, begin, get, start out, start,
set about, set out, commence
• Verb Frames:
- Something ----s
- Somebody ----s