1. Fate or
destiny caused or originated by a smooch.
2. A term describing how two
people became acquainted with each other through fate or
destiny, and largely due to their having locked lips at some point.
After George McFly succeeded in knocking out Biff Tannen in the Hill Valley High School parking lot and thus showed Lorraine Baines that he was a worthy partner after all, the
two teenagers finally hooked up when they shared their first passionate smooch on the
dance-floor during the Enchantment Under The Sea
party; they later agreed that their meeting was kissmet.