To get absolutely drunk (usually off of hard liquor). Below the drunken state of feeling sick.
This term derives from the first name of Serbian tennis player Janko Tipsarevic
Mike: Yo, what's up with your buddy?
Geoffrey: He's absolutely janko'd. He had way to many jager bombs tonight.
A “tool”; a person of limited intellectual ability easily manipulated by those with greater powers than him or herself; one who interferes with an otherwise smoothly ongoing process; A complete embarrassment