Two Possible Definitions depending on the context.
Definition 1: Hey. Hi, or What's Up?
Definition 2: Drinking Alcohol.
Person 1: Oh Dreado!
Person 2: Dreado Man, whats happenin?
Person 1: Hey Man did you Dreado last night?
Person 2: Yeah Dude I Dreado'd so much I blacked out.
Alright, or chill with the comment just made.
Person 1: Hey we are going bowling tomorrow.
Person 2: Well Dreado to that.