The state of feeling tired, worn-out, dirty, smelly, rough, decadent and physically unattractive, all in one. Can also be used to describe an object. Originates from the Swedish slang word 'sunkig'.
I just spend the whole weekend taking drugs and drinking, and I woke up this morning covered in vomit. Damn, I feel sunky.
I got this really sunky couch from the flea market.