Pretty Hungry All The Time. Used by younguns-teens-young adults, not as an insecurity cry, but as an expression of ones desire for food in order to grow.
"I like long romantic walks to the refrigerator, cos' I'm phatt."
by The cookie monster December 09, 2013
to have a wide, plumb, large behind
Tiffany's butt got phatt over the summer
by Simone November 01, 2003