Top Definition
<u3 is an expansion to the popular <3 (heart). The addition of the letter 'u' shows the recipient that they are in your heart.
Mike: <u3
Nora: Awww <3333333
by FatKldsLoveCake February 13, 2013
<u3 means your in my heart

i love you nicole
frankie: hey <u3

nicole: <u3 too.
by elmooooo January 11, 2009
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