a currency (= the money used in one country) that is not worth much and whose value can change quickly 币值低（或不稳定）的货币 They are just pumping billions of funny money into the economy. 他们只是向经济注入了数十亿美元的有趣资金。
money that has been illegally printed, stolen or has come from illegal activities; money that is not real because it has been created for a game 假币；来路不明的钱；黑钱 Police seized more than 5 million dollars' worth of funny money. 警方查获了价值超过500万美元的滑稽钱。 playing poker with funny money 用有趣的钱玩扑克