mad money

== English == === Pronunciation === === Noun === mad money (uncountable) (idiomatic) A sum of money, often relatively small in amount, kept in reserve to use for impulsive, frivolous purposes. (idiomatic) A sum of money kept in reserve or to insulate oneself financially in the event of the sudden breakdown of a relationship in which one is economically dependent. === See also === pocket money, spending money === References === “mad money”, in OneLook Dictionary Search. Random House Webster's Unabridged Electronic Dictionary, 1987–1996.