Green’s Dictionary of Slang

shitbird n.2

also shitbug
[shit n. (1a) + bird n.1 (3a)]

a general term of abuse.

[US]Mencken letter 18 Sept. in Riggio Dreiser-Mencken Letters II (1986) 539: You give too much credence to the literary shit-bugs who infest New York.
[US]J. Blake letter 23 Dec. in Joint (1972) 27: Louie remains the Eternal Shit-Bird.
[US](con. early 1950s) J. Peacock Valhalla 43: He was always a shitbird anyway.
[US]H. Rhodes Chosen Few (1966) 213: He rounded the corner of the armory and saw Givens [...] bellowing ‘I’M TH’ BIGGES’ SHIT BIRD IN TH’ TRAINING SECTION!’.
[US](con. 1920s) J. Thompson South of Heaven (1994) 40: You stinking little shitbird.
[US]D. Ponicsan Last Detail 4: They’d never send a shitbird like you to sea.
[US]J. Wambaugh Choirboys (1976) 283: ‘You cute little shitbird,’ she giggled, pounding Francis on the head.
[US]S. King Stand (1990) 161: He’s deader’na shitbug!
[US]T. Wolfe Bonfire of the Vanities 42: You yellow shitbird!
[US](con. early 1950s) J. Ellroy L.A. Confidential 10: Capisce, shitbird?
[US]C. Hiaasen Stormy Weather 305: What’re you doing with that shitbird, anyway?
[US]J. Ellroy ‘Balls to the Wall’ in Destination: Morgue! (2004) 11: Rap stars and movie shitbirds verboten.
[US]G. Pelecanos Night Gardener 285: Bo gave up on the shitbird.
[US]Simon & Burns ‘Transitions’ Wire ser. 5 ep. 4 [TV script] Shitbird lays on his horn he should be locked up. Fuck his ignorant ass.
[US]G. Pelecanos (con. 1972) What It Was 183: Hey, shitbird [...] I’m a police officer.
Balimore Sun (MD) 3 June T23/4: ‘You do not get to win, shitbird’.