Abbreviation used for the pairing of the Yu-Gi-Oh characters Kaiba Seto and Jounouchi Katsuya. A favorite yaoi coupling of YGO fangirls. Kaiba and Jounouchi are paired up so much because in the show and manga they hate each other. Kaiba's usually the seme.
"Good." Joey still sounded nervous, but his movements became more assured, firmer as his hand stroked Kaiba's length.