From Longman Dictionary of Contemporary Englishfunny moneyˈfunny ˌmoney noun [uncountable] informal MONEYmoney that has been printed illegally → counterfeitFrom Longman Business Dictionaryfunny moneyˈfunny ˌmoney informal1money that is worthless outside the country where it is usedWho wants to be paid in funny money that is forever being devalued by inflation?2money that has been printed illegallyPolice issued a warning about funny money after a motorist paid for petrol with a forged £20 note. → money