(slang, vulgar, derogatory, military) An objectionable person.
1979, Gustav Hasford, The short-timers (page 10)Only shitbirds try to avoid work, only shitbirds try to skate. Marines are clean, not skuzzy. I teach Leonard to value his rifle as he values his life. I teach him that blood makes the grass grow.
2009, Jason Christopher Hartley, Just Another Soldier: A Year on the Ground in IraqThe blond prick and his two shitbirds were never far away, but they eventually gave up and walked back to the barracks.