1 definition by Maktie

Top Definition
When two people who are not related share literally almost everything in common, and are better than best friends with each other.
Mike and Katie arent related. They both hate socks and projects. But they both love orange starbursts and running.They also have everything else in common and always keep finding new things.This means they have a twinship.
by Maktie March 03, 2009

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