noun
idle funds; idle money
Financial term for money not currently invested or earning interest; often used in business or economic contexts. Compare 遊金 (ゆうきん), a synonym with a more formal or technical feel.
See also: 遊金 (ゆうきん)
遊び金を投資に回すべきだ。
You should put idle funds into investments.
銀行口座に遊び金がたくさんある。
There is a lot of idle money in the bank account.