chip in

To make a contribution; help in a small way; especially, to pay for a part of something.
To contribute (something); to contribute to (something).
To ante; to put into the pot the amount of chips or money required to continue.
(informal) To interrupt a discussion for the purpose of making a comment.
To put a chip shot in the hole.
(slang) To join in (something); to butt in or contribute (something) to a conversation; to say (something).