If you describe someone as sleek, you mean that they look rich and stylish. Lord White is as sleek and elegant as any other multi millionaire businessman
having a smooth, gleaming surface; "glossy auburn hair"; "satiny gardenia petals"; "sleek black fur"; "silken eyelashes"; "silky skin"; "a silklike fabric"; "slick seals and otters"
Sleek vehicles, furniture, or other objects look smooth, shiny, and expensive. a sleek white BMW. sleek modern furniture. to make hair or fur smooth and shiny by putting water or oil on it sleek sth back/down etc
Sleek hair or fur is smooth and shiny and looks healthy. sleek black hair The horse's sleek body gleamed