Phat does mean Pretty Hot And Tempting, like the other definitions say. The problem with "phat" is that it is no longer in really. It has kind of phased out and is mostly used by wannabes, lowerclassmen in high school, or middle schoolers. It is now considered a slang faux pas. I wouldn't use it if I was you.

a high school student in 11th grade that is almost a senoir, and apparently thinks they have earned respect, even though in most cases havent. They think they should be respected because they are a junior, but have no reason to be respected. are usually hostile to lowerclassmen mostly out of jelousy, because they wish peole cared about them.

the essence of being a hooligan.
also acting in the nature of a hooligan.

A highly fascist town in which everyone thinks they are the dankest ass people because theyve tried marijuana once in their lives, also consisting of gay ass people preferably the class of 2011 because all of the girls that hung out with the so called "skater pot head badasses" get group rate discounts on abortions and beg unpopular lowerclassmen to buy them pregnancy tests and they think that theyre so cool becuase most of their parents are bigger fuck ups then them.
Also consisting of about one billion and two asians or filipino folks. And the rest, well theyre white people who act like thugs and travel 82 miles to the nearest mall to buy crap that will be out of style in less than six months. In oak harbor the idea of independance was killed when the dutch settled there.

Someone who will never notice you.