Hafta

  1. interj. [I] will have to; of course. Used as a one-word affirmative response to a boolean question, for example, You goin' to the party tonight? The proper intonation of hafta is subtle: the tone rises in the first syllable and falls in the second syllable; the f is carried approximately a major fifth above the h and the a is carried back down through and sometimes slightly below the starting point at the h.