hoop·er I. \ˈhu̇pə(r), ˈhüp-\noun (-s) : one that hoops: as a.: a man or machine that makes or applies hoops (as to barrels or tubs) b.: a worker that stretches skins (as sealskins) over a hoop-shaped frame for curing or processing c.: hoopster II. orhooper swan variant of whooper swan