1 definition by her boyfriend12345

Top Definition
a girl who is beautiful and has a gorgeous smile she is the prettiest girl in the world has ALOT of friends everyone loves her and wants to be just like her. a gianna is extremely popular and EVERYONE loves her a gianna is hard to live without has a sexy body. all the guys want to bang her cause of her nice ass and awsome tits but has a great and fun personality to.
jack: look at that ass she is such a gianna
micheal:yea and i love her personality...ur right its a gianna
by her boyfriend12345 August 12, 2011

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