Definitions of hopper:

• noun:   funnel-shaped receptacle; contents pass by gravity into a receptacle below
• noun:   someone who hops

  Example: "At hopscotch, the best hoppers are the children"

• noun:   terrestrial plant-eating insect with hind legs adapted for leaping
• noun:   a machine used for picking hops
• noun:   (baseball) a hit that travels along the ground
• name:  A surname (common: 1 in 6666 families; popularity rank in the U.S.: #827)