1. To be drunk.
2. Actions as a result of being drunk.
3. To be hungover.
Tatanka, dude, I was wicked slathyd.
Why did you keep calling your ex-girlfriend?
Get off my back, I know it was dumb, I was slathyd.
Dennis, you were wasted last night, how do you feel this morning?
Joe, man, I feel rather slathyd.