hopper

1. One who or that which hops.
2. A temporary storage bin, filled from the top and emptied from the bottom, often funnel-shaped.
3. A funnel-shaped section at the top of a drainpipe used to collect water, from above, from one or more smaller drainpipes.
4. A bin or device that feeds material into a machine.
5. Any of various insects known for hopping, especially a grasshopper or locust, the immature form of a locust, or the larva of various flies and beetles.
6. An artificial fishing lure. · To catch a big fish, use a hopper that jumps across the pond surface.
7. A toilet. (slang)
8. An escapement lever in a piano.

Plural hoppers