A variant on "phat". Not to be confused with fat-ass, which is used to describe people who are really freakin fat.
by Rosh April 20, 2003
Get the phat-assmug. a booty that's in a ratio of at least 5:3 to the waist, well rounded, juisy and jeans-filling. has a bounce on it too
by Danger Mouse_1 May 11, 2006
Get the Phat assmug. The perfect ass. The ass that an ass man would only dream of. The requirements for a phat ass are as follows: it must be firm enough not to be sloppy, it must be very round, it must exceed the waistline by at least 3 inches, and its owner must let you experience it.
Sam: Whoa look at that phat ass on that girl
Matt: Damn, id like to cut me a piece of that pie
Bogart: Me like asshole
Sam: No Bogart, its the ass we like, not the asshole
Matt: Whats wrong with you Bogart
Bogart: Me like the asshole!
Matt: Damn, id like to cut me a piece of that pie
Bogart: Me like asshole
Sam: No Bogart, its the ass we like, not the asshole
Matt: Whats wrong with you Bogart
Bogart: Me like the asshole!
by cohencock November 18, 2009
Get the phat assmug. 
girl must have a thin waist, then have a round full booty, which has to have a bounce when she walks
by Mike1234 September 21, 2008
Get the phat assmug. a girl that has a nice round soft ass that i love 2 squeeze and it bounces when she walks but it isn't sloppy
by Lil Red AKA Cherry November 5, 2007
Get the phat assmug. by tobyispog May 10, 2021
Get the phat assmug.