rumpsprung
rump sprung |ˈrəmpˌsprəNG ˈrəmpˌsprəŋ | ▶adjective informal (of furniture ) baggy and worn in the seat: a rumpsprung armchair.
rump |sprung |ˈrʌmpsprʌŋ | ▶adjective informal (of furniture ) baggy and worn in the seat: a rumpsprung armchair.