Moldy describes a certain type of person who lives in
the Washington,
D.C. area. The way the act, dress, talk, etc. is so commonplace, it's as if they've come out of a mold.
Piper: "Omigod, Taylor, I'm starrrrrving! Want to go to
Chop't on our lunch break and get some salads with no dressing?"
Taylor: "Um, yeah,
obvi, Pipes. Let me just change into my
Tory Burch flats and I'll be ready. K?"
The aboce exchange represents two moldy people discussing lunch plans.