A joint combination and slurr of the words so and hungry. Usually used when a person is extreamly blazed, or just keyed as fuck.
Steve: You wanna get something to eat?
Travis: Im sungry lets go to steak n shake and get a double steakburger, hushpuppies, and a milkshake huuuuuuuuhh.
A combination of stupid and angry. If someone is stangry, they are enraged for no good reason or don't even know why they are agnry, or are angry due to them not being able to understand what's going on.
Rick was really stangry after he played baseball yesterday, he didn't know all the rules and thought everyone else was cheating.