chip in

To make a contribution; help in a small way; especially, to pay for a part of something.

“If we all chip in, we can afford to buy a pizza for lunch.”

To contribute.

“He chipped in twenty for the retirement gift.”

To ante; to put into the pot the amount of chips or money required to continue.

“He seemed to hesitate when he chipped in.”

To interrupt a discussion for the purpose of making a comment.

To put a chip shot in the hole.

“He chipped in from 20 yards for a birdie.”