When someone is really fat, like really, really fat.
Wow than man is weight watchers phat.
P- Pretty
H- Hot
A- And
T- Thicc
Girl: Ugh, I'm so fat.
Girl 2: Gurl, you must mean PHAT!! Pretty, hot, and thicc.
(Adj) Large in size or effect. Immense.
I just dropped a phat one in Jim's shitter.
I took some phat pills and tripped for hours.