the morning after

the morning after (the night before)

A hangover. A: "Ugh, I feel so sick." B: "Sounds like the morning after the night before to me. Weren't you out at the bar last night?"
See also: after, morning, night
Farlex Dictionary of Idioms.

the morning ˈafter (the night beˈfore)

(informal) the morning after an occasion when somebody has drunk too much alcohol and is feeling tired, ill/sick, etc: She was suffering from the effects of the morning after. a morning-after headache
See also: after, morning
Farlex Partner Idioms Dictionary

the morning after

verb
See the morning after the night before
See also: after, morning
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions

morning after, the

The generally unpleasant consequences of a previous action or activity. The term originated in the late nineteenth century and at first referred exclusively to the aftereffects of a drinking bout; it often was put as the morning after the night before. By the mid-twentieth century it had been extended to include the consequences of any prior action, although it retained the negative implications of a hangover. It is also used in the colloquial name for an oral contraceptive taken after intercourse has occurred, the morning-after pill.
See also: morning
The Dictionary of Clichés by Christine Ammer
See also:
  • morning after
  • morning after, the
  • the morning after (the night before)
  • the morning after the night before
  • I was up all night with a sick friend
  • at night
  • creamed
  • day and night
  • a night on the tiles
  • tile