Someone who has passed the pinnacle of their career. Bob is never going to give up his cushy job—he's yesterday's man, and his next career move is retirement!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
yesterday's mana man, especially a politician, whose career is finished or past its peak.
See also: man
Farlex Partner Idioms Dictionary © Farlex 2017