A synonym for good. It's origins came about from the notorious Luther Dease, the only Black teacher in all of Grand Haven, MI. Dease = good because black people = good.
K-Cash: "Dude that T-Bell was DEASE!"
Lo: "So was the Steven Wilkos show this morning."
Stew: "Your ass is far from dease."
Lo: "Mine is far deaser than yours."