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1.
KX
An unnecessarily shortened way to type the word 'cakes', deriving from the fact that KX spoken aloud sounds just like it (accent depending)

Also, unrelatedly, a brand of energy drink
Jennifer - I like KX lol, especially chocolate ones!! :P

Annabelle - I also like KX :D
by tat_maddo August 02, 2011
 
2.
KX
Kinda-ex. A ex that was unofficial to begin with.
Even though they made out, John never actually asked Jill out. So she refers to him as her "KX," now that their relationship has ended.
by smallishtallone9 April 20, 2009