hopper (Noun) — Funnel-shaped receptacle; contents pass by gravity into a receptacle below.
hopper (Noun) — Someone who hops. ex. "at hopscotch, the best hoppers are the children"
hopper (Noun) — A machine used for picking hops.
hopper (Noun) — Terrestrial plant-eating insect with hind legs adapted for leaping.
hopper (Noun) — (baseball) a hit that travels along the ground.
hopper (Noun) — A young street-level drug dealer.