Definition of chip in phrasal verb from the Oxford Advanced Learner's Dictionary

 

chip in

 phrasal verb
phrasal verb
 
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Phrasal Verbs

    chip in (with something)

    (informal)
     
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  1. 1to join in or interrupt a conversation; to add something to a conversation or discussion Pete and Anne chipped in with suggestions. + speech ‘That's different,’ she chipped in.
  2. 2(also chip in something) to give some money so that a group of people can buy something together synonym contribute If everyone chips in we'll be able to buy her a really nice present. We each chipped in (with) £5.
See the Oxford Advanced American Dictionary entry: chip in