grind the corn

acknowledge the corn

To admit to the truth of the point at issue or to a mistake; to cop a plea; or perhaps to admit to a small error but not a larger one.

bump and grind

A sexually suggestive dance involving exaggerated hip movements, especially a striptease dance.

can of corn

An easily caught fly ball.

daily grind

The difficult, routine, or monotonous tasks of daily work.

eat one's seed corn

To consume what is meant for investment instead.

grind down

To weaken someone's morale over a long period.

grind one's gears

To annoy or irritate one.