What does 'chip-in' mean?

[Henna]

English Language Tests, Intermediate level

ESL/EFL Test #191 "Phrasal Verbs (C)", question 4

The supervisor asked everyone to ......... for the manager's birthday present.

(a) chip
(b) chip over
(c) chip in

English Language Tests, Intermediate level

ESL/EFL Test #191 "Phrasal Verbs (C)", answer 4

The supervisor asked everyone to chip in for the manager's birthday present.

Correct answer: (c) chip in

Your answer was: correct
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what does Chip-in mean

[Alan]

Hi,

The sense of 'chip in' is make a contribution usually in the form of money to a fund that is being collected - in this case to provide money to pay for a birthday present.

Alan
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English as a Second Language
You can read my ESL story Adverbs