funny money

(slang, uncountable)Counterfeit money.

(slang, uncountable)Money obtained in a devious or sneaky manner.

(slang, uncountable)An outrageously high price.

They wanted funny money for it, so I refused.

(derogatory, often, slang, uncountable)Banknotes of any foreign currency.

(US, informal, slang, uncountable)A highly inflated currency.

(slang, uncountable)Play money.