chip in

verb

1. To give in common with others: contribute, donate, subscribe. Informal kick in. Slang come across. See give/take/reciprocity.
2. To interject remarks or questions into another's discourse: break in, chime in, cut in, interrupt. See continue/stop/pause.

1.  Contribute money, help, or advice, as in If we all chip in we'll have enough to buy a suitable gift, or Everyone chipped in with ideas for the baby shower. Mark Twain used this term in Roughing It (1872): "I'll be there and chip in and help, too." [Mid-1800s]
2.  In poker and other games, to put up chips or money as one's bet. For example, I'll chip in another hundred but that's my limit or, as Bret Harte put it in Gabriel Conroy (1876): "You've jest cut up thet rough with my higher emotions, there ain't enough left to chip in on a ten-cent ante." [Mid-1800s]

Definition: contribute
Antonyms: pilfer, take, take away

The verb has one meaning:

Meaning #1: contribute to some cause
  Synonyms: contribute, give, kick in