To freak out, and drive away, a potential date with sexually deviant behavior. This can include anything from joking about bondage, to attaching a fishhook to a dates arm and offer to suck it back out again. A Kenzi can be achieved by any gender unless in Amsterdam. It should be noted that there are no laws prohibiting the Kenzi, becasue a Kenzi is not harmful unless pursued in any of the following, rape, murder, etc. which come with the casting of an unforgivable curse of the on street ninja fight.