- one could do something in one's sleep
- informal one regards something as so easy that it will require no effort or conscious thought to accomplish
she knew the music perfectly, could sing it in her sleep
Useful english dictionary. 2012.
she knew the music perfectly, could sing it in her sleep
Useful english dictionary. 2012.
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sleep — sleep1 [ slip ] (past tense and past participle slept [ slept ] ) verb *** 1. ) intransitive to go into a natural state in which you are unconscious for a time and your body rests, especially for several hours at night: The baby usually sleeps in … Usage of the words and phrases in modern English