english
1
general::
Phrase(s): not sleep a wink not to sleep at all. • I couldn’t sleep a wink last night. • Ann hasn’t been able to sleep a wink for a week.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Not sleep at all, as in I couldn't sleep a wink last night. This expression, in which wink alludes to closing the eyes for sleep, was first recorded about 1325.
American Heritage Idioms