I have done this task so often I could do it in my sleep.
one could do it in one's sleep
idiomSaid of something that can be done very easily or effortlessly.
After working as a mechanic for twenty years, he could do it in his sleep, even when the engine problems were complex.
The veteran pianist played the intricate concerto with such effortless precision that it seemed she could do it in her sleep.
- 01
abound in one's own sense
To follow one’s own inclinations and opinions.
- 02
ace up one's sleeve
A surprise advantage of which others are not aware.
- 03
act one's age
To behave in a manner appropriate to one's age.
- 04
act one's age, not one's shoe size
Synonym of act one's age (“to behave in a mature manner; to avoid being childish”).
- 05
afraid of one's own shadow
Exceptionally timid.
- 06
air one's dirty laundry in public
To reveal one's sordid secrets to the public.
- 07
air one's dirty linen in public
Synonym of air one's dirty laundry in public.
- 08
albatross around one's neck
A characteristic, possession, associate, or previous deed that hinders one's ability to succeed.