Definition from Wiktionary, the free dictionary
- Rhymes: -iːdi
- disreputable; run-down
- The healing power of alcohol only works on scrapes and nicks ;; and not on girls in seedy bars who drown themselves in it. (from "Choice Hops and Bottled Self Esteem by Bayside)
- full of seeds
- pomegranates are as seedy as any fruit you are likely to see.
- untidy; unkempt
- infirm; gone to seed
- With her aching back and pronounced limp, she was feeling particularly seedy today.
- suffering the effects of a hangover
- After last night's party we were all feeling pretty seedy.
- (colloquial) Having a peculiar flavour supposed to be derived from the weeds growing among the vines; said of certain kinds of French brandy.
Derived terms 
suffering effects of hangover