a kaj is someone who is so bum sex you want to yell "NUP NUP NUP" or "Sea cu-cu-CUM CUM CUM-ber" or something like that. and he's popular to boot. and all of those ginger's love him. and kaj's are very attracted to gingers too. the end.
ohhhhhh kaj your so bum sex
by KAY-EYE, KADGIE March 26, 2003