Top Definition
A dude from a Galveston Island Texas that is cool funny damn right ballin and is ready to do anything no matter what the consequences.
Hey PHAT BOI what you doing tonight?
by PHAT_BOI_409 February 24, 2010
1 more definition
A big man who is funny and a great singer. He always makes u laugh unless u r cleaning. He may be big but he at least keeps a house clean and he can cook really good.
Damn Phat Boi is the best dude u can meet.
by Pnutt4500 April 02, 2013

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