【be hung over 】 —(sl.) suffer from a hangover:

• Do not allow anyone to operate a forklift who is under the influence of alcohol or is hung over.

Note: The expression does not correlate in meaning with the phrase be hung up—(sl.)

1. be bewildered or mentally confused:

• He was more than a little hung up, stupid from lack of sleep, worried about his work.

2. be delayed or stopped by smth.:

• Incidentally, I would have been here much sooner, but I got hung up.

hang over —(of customs, traditions, etc.) remain from the past:

• There’s arrogance that hangs over from the days of Empire, that tells us we don’t have to speak a foreign language.

See also: be hanged / be hung.