a large group of people or animals

crops, agricultural produce

migratory locust

a grasshopper

To exhaust; deplete; use up. / serve, assist

to do to exhaustion, to do something completely

to put something in one's mouth / (men's speech, vulgar) to eat, to devour / to make a living, to live; to survive / to tease, to taunt, to make light of, to make fun of; to torment

(figuratively) to wear out with one's heart and soul

cry one's eyes out

(idiomatic) to do one's best; to do something to the best of one's ability