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hang over (someone or something)
1. To be an imminent threat to or imposition on someone or something. I decided to do my essay now so it wouldn't be hanging over me all weekend. The consequences of the new legislation is hanging over companies across the country.
2. To cause someone continual stress, dread, or unease. Guilt over what happened has been hanging over me for years.
Suffering from the effects of drinking an excessive amount alcohol (typically the night before). Such symptoms, which can include headache and nausea, are collectively called a hangover, from which the adjective is derived. You better start drinking water in between all those shots, or else you're going to be wicked hung over tomorrow.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.