Definitions by Maaadddyy
kai
/kɑɪ/ (n) A term used in south india, derived from many south indian languages' word for 'hand' and incorporated into colloquial English use, that is used to describe ongoing sexual relations between a guy and a girl. It could be argued that the actual nature of the usage is in a grammatically incorrect form, but it is a word never used in writing, and, on average, the population gives somewhere around 0 fucks whether or not it's grammatically proper.