Abbreviated place name for one of the dirtiest places on the planet - Swadlincote, Derbyshire, England. Surrounding towns/villages etc. include Gresley,Woodville, Newhall,Burton and more tramp-worthy places. Largely populated by inferior mutants and the like, it has a faint smell of musty shit lingering constantly.
Shops in the town centre include: card shops, shops that sell cards and card selling shops.
If you were to travel to Swad, drive through Swad, see a picture of Swad or throw a banana flavoured pie into the unsuspecting face of a man called Fred Swad, you would probably say something along the lines of "what a shithole! i've never smelled anything mustier!".
"oh, let's go Swad!" said Bob.
"err, no." said Fred.