hangover
1. [ noun ] disagreeable aftereffects from the use of drugs (especially alcohol)
Synonyms: katzenjammer
Related terms: discomfort
2. [ noun ] something that has survived from the past
Synonyms: holdover
Examples:

"a holdover from the sixties" "hangovers from the 19th century"

Related terms: survival hold_over
3. [ noun ] (work) an official who remains in office after his term
Synonyms: holdover
Related terms: official hold_over