MAD

(ENTHUSIASTIC) [adjective] madder or maddest [informal] - very enthusiastic and interestedJane's mad about Italian food.He's fashion mad, spends every penny on clothes.(informal) If you are mad about a person, you love or like them very much.After twenty years of marriage they're still mad about each other.(informal) If you do something like mad, you do it very enthusiastically, quickly or a lot.Since she decided to buy a car she's been saving like mad.