Quote Originally Posted by Razzle View Post
I thought DD meand Damage Dealer, as in a class/job who's role is to... Deal damage hehe...

While DPS means Damage Per Second, which is basically means the amount of damage you deal over time.
The term DPS can be used on any job or class. Example: A WHM spamming stone is DPSing for X.

While DD can not. A WHM is not a DD, but can does DPS.
Damage Dealer is a more "casual" reference from DD, but the true roots of DD in RPG games has its definition as, "direct damage".