How to read (transcription):
[nye v see-BYE]
(lit. – out of oneself)
1. crazy, wacko, nuts, not in his right mind
2. in a bad state, thrown off balance
Leave him, he is not in his right mind.
More from "Conversational Russian"
to give a scolding
(= чушь, обман) baloney, rubbish
to go crazy, to lose one's wits
lit.: to break through the bottom to do something so morally (or in any other way) low that is lower than everything else
damn! drat! blast it! gosh! (lit. - pancake)
to pester, to bother, to annoy, to tire, to weary