What does this idiom mean: spend money like water?

[Dummy]

English Idioms and Expressions, Advanced Level

ESL/EFL Test #9 "Water Expressions", question 6

Don't ever lend him money, he spends it like water.

(a) very slowly
(b) very often
(c) very freely
(d) very carefully

English Idioms and Expressions, Advanced Level

ESL/EFL Test #9 "Water Expressions", answer 6

Don't ever lend him money, he spends it very freely.

Correct answer: (c) very freely
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What does this idiom mean: spend money like water?

Dummy

[Alan]

Hi,

This means he doesn't think about what he is spending his money on and he doesn't worry about spending money.

Alan
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