chip in phrasal verb ( see also ↑ chip )
1 . to interrupt a conversation by saying something that adds more detail
chip in with
Other committee members chipped in with suggestions.
‘It won’t be easy,’ Jeff chipped in.
I’d just like to chip in, Bill, if I might.
2 . if each person in a group chips in, they each give a small amount of money so that they can buy something together:
We all chipped in to buy Amy a graduation present.
chip in (with) something
Fifty-two people in the music industry each chipped in $250 apiece.