To chip in is to contribute money or a remark. Everybody chip in a fiver, he chipped in with a suggestion.
The money sense is a small share from each rather than one large gift. The remark sense means joining a conversation briefly, and it is usually welcome.
1phrasechip inTo contribute money or a remark.
“If we all chip in we can buy something decent.”
chip in is a phrase.
Practised in Phrasal Verbs