Open English Wordnet
Nouns
(n)smart moneymoney bet or invested by experienced gamblers or investors (especially if they have inside information)
(n)punitive damages, exemplary damages, smart money(law) compensation in excess of actual damages (a form of punishment awarded in cases of malicious or willful misconduct)
(n)smart moneypeople who are highly experienced or who have inside information“the smart money said Truman would lose the election”