somebody or something that hops
a leaping insect; specif an immature hopping form of an insect
a receptacle, esp funnel-shaped, for the discharging or temporary storage of grain, coal, etc
a goods wagon with a floor through which bulk materials may be discharged
a barge that can discharge dredged material through an opening bottom
[(sense 3) from the shaking motion of hoppers used to feed grain into a mill]