Top Definition
Originates from the word Mhm which is another word for Ok and indicates the motion of nodding. Kaii is a cooler spelling then Kay, the short for Ohkay. Mmkaii is the combination of the too... the meaning of the word is Ok.

Prounced: M(sound that M makes) kay
Brooke: Let's go to the mall after school
Alyson: Mmkaii.
by LadyGaGoo August 24, 2009
5 Words related to Mmkaii

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