Definition of shake a leg in English:

shake a leg

[as imperative] informal Make a start; rouse oneself: come on, shake a leg
Synonyms
hurry up, get a move on, be quick, speed up
North American informal get a wiggle on
South African informal put foot
dated make haste
See parent entry: shake

Definition of shake a leg in:

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Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up