The correct spelling of the phrase "mads for" is actually "mad for." The word "mad" is used as an adjective meaning extremely fond of or passionate about something. The "for" is a preposition indicating the object of the person's passion. The pronunciation of "mad" is /mæd/, with a short "a" sound and a voiced "d" at the end. When combined with "for," it is pronounced as /mæd fɔr/, with the "o" sound in "for" being pronounced as an "aw" sound.