Top Definition
A boy who is your main crush above all, hence ;thing 1; Usually crush lasts a few years, may have know him and previously talked to him, usually has a ugly girlfriend who resembles a guy and therefore makes your friends say you are better looking.
Girl 1- Ughh I have a new crush

Girl 2- Who?

Girl 1- Thing 1

Girl 2- Oh is he your main crush?

Girl 1- Yup
by Thing 1 Expert September 22, 2009

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