Be able to do something in your sleep
phrase
To be very familiar with a task or skill, to the point of being able to perform it without having to think about it.
He's been practicing guitar so long, he can play it in his sleep.
Often appears as...
- play in his sleep
- do it in his sleep
Usage tips
Idiomatic
phrase
To be very familiar with a task or skill, to the point of being able to perform it without having to think about it.
He's been practicing guitar so long, he can play it in his sleep.
Often appears as...
- play in his sleep
- do it in his sleep
Usage tips
Idiomatic
Definition 1 of 1
Pro Tip 1/3Expert Level
Use this phrase to express a high level of skill or expertise in an activity.
She can solve complex math problems in her sleep—she's a real expert.
Pro Tip 2/3Colloquial Use
It's informal slang, suitable for casual conversations rather than formal or professional settings.
Don't worry about the test; you've studied so much, you could do it in your sleep.
Pro Tip 3/3Hyperbole
This phrase is an exaggeration, not to be taken literally—it's just a way of emphasizing proficiency.
I've made this recipe so many times I could do it in my sleep.
Pro Tip 1/3Expert Level
Use this phrase to express a high level of skill or expertise in an activity.
She can solve complex math problems in her sleep—she's a real expert.
Pro Tip 2/3Colloquial Use
It's informal slang, suitable for casual conversations rather than formal or professional settings.
Don't worry about the test; you've studied so much, you could do it in your sleep.
Pro Tip 3/3Hyperbole
This phrase is an exaggeration, not to be taken literally—it's just a way of emphasizing proficiency.
I've made this recipe so many times I could do it in my sleep.
Pro Tip 1/3Expert Level
Use this phrase to express a high level of skill or expertise in an activity.
She can solve complex math problems in her sleep—she's a real expert.
Pro Tip 2/3Colloquial Use
It's informal slang, suitable for casual conversations rather than formal or professional settings.
Don't worry about the test; you've studied so much, you could do it in your sleep.
Pro Tip 3/3Hyperbole
This phrase is an exaggeration, not to be taken literally—it's just a way of emphasizing proficiency.
I've made this recipe so many times I could do it in my sleep.
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