The state of drunkenness when one becomes nearly or completely comatose. His or her appearance resembles a child with down syndrome or Terri (from whence the term is derived). Alcohol poisoning often accompanies a person when they get this intoxicated. Black outs and tunnel vision are also related. In order for a person to reach Shiavoed, they must first become: tipsy, drunk, smashed, hammered, plastered then finally shiavoed.
Johnny played powerhour at a bar for 5 hours and became completely shiavoed at the end of the night.