Placeholder

[Kit]

the person one dates, makes out with, or sleeps with while waiting or actively searching for the love of ones life - who is quite often found during or immediately after relationship with said [placeholder].
Though also [viable], cute, and longing for a longterm relationship, there is often some unknown thing in the [placeholders] manner, ambition, world view, or timing that often prevents the placeholder from being the one.

[Donald Trump]

A significant zero in the decimal representation of a number.