Originates from the ye old mainer up alone on his porch talkign about the passer byers. Commonly used with the term little infront of it.
"oh look at that one he is a little shitbird"
by Justin B-K January 21, 2006
A racial slur for black people.
I would have taken the Dan Ryan, but its always full of shitbirds.
by The Baron of Beverly November 08, 2007
one who eats his own shit
Bob Boule is the dumbest shitbird at this company
by Steve O December 05, 2003