swank ‧ y /ˈswæŋki/ BrE AmE adjective informal
[ Date: 1800-1900 ; Origin: swank 'to behave showily and boastfully' (19-21 centuries) , perhaps from Middle High German swanken 'to move unsteadily from one side to another' ]
very fashionable and expensive:
eating meals at swanky hotels