When a brother and sister, marry another set of sister and brother. Thus, marrying their in-laws. Their kin folk would usually be called cousins. But in the case of a kibling, they are more then cousins.
they are sibling-cousins. (KIBLING)
My mom's sister married my dad's brother. Their not just cousins, but not quite siblings. They're kiblings!
To gently play with the belly button or the buttcrack of your significant other. This usually is a rubbing motion, and often will leave a funky smell or taste