Green’s Dictionary of Slang

shithead n.

also shathead, shitehead
[shit n. (1a) + -head sfx (1)]

1. a derog. term of general abuse.

[US](con. 1948) G. Mandel Flee the Angry Strangers 242: You big shithead.
[US]J. Jones From Here to Eternity (1998) 813: Kotz, kotz. The shithead. [Ibid.] 814: No wonder they had such stupid shitheads for officers, if they give them such childish examinations as this.
[US]T.C. Bambara ‘Sweet Talk’ in Gorilla, My Love (1972) 125: Eddie is a shithead.
[US]S. Longstreet Flesh Peddlers (1964) 48: At COK there were various ways of labeling clients [...] In descending order there were the creep, kook, screwball, shathead.
[US]L. Bruce Essential Lenny Bruce 200: I’m gonna get even with you, you shithead you!
[US]S. Ace Stand On It (1979) 171: Hellfire, I don’t like flying all that much anyway, you shitheads.
[US]G.V. Higgins Digger’s Game (1981) 92: You oughta go to the Home, you shithead.
[US]C. Hiaasen Skin Tight 223: In a slack voice Murdock said, ‘Fuck you, shithead’.
[Aus]R.G. Barrett White Shoes 38: What you’re looking for, shithead, is in the local yellow-pages.
[UK]N. Barlay Curvy Lovebox 18: Pro’ly homeless shiteheads from Mersey.
[Aus]R.G. Barrett Goodoo Goodoo 256: You’re here now, shithead. What do you want to fuckin’ know?
[UK]K. Sampson Powder 98: The girl was a shithead.
[UK]N. Griffiths Grits 350: Patronisin bastard, tha Malcolm. Southern England, see; Sassenach. Saesneg shit’ed.
[US]C. Hiaasen Skinny Dip 120: It was the best part of my job, sending shitheads up the river.
[UK]T. Black Gutted 2: I quickly hoyed his face down onto my boot. ‘Taste that, shithead’.
[US]D. Winslow The Force [ebook] ‘Notes you take on duty are discoverable. Some defense attorney shithead will deliberately misinterpret them’.

2. (US drugs) a heroin addict.

[US]A. Shaw Dict. Pop/Rock.
[US]J. Ciardi A Second Browser’s Dict. 248: Shithead [...] 2. A heroin addict.
[Aus] L. Jose ‘Underhooks’ in Crime Factory: Hard Labour [ebook] All the shitheads and tradies ended up keeping WA arm.

3. (US prison) a prison guard.

[US]S.L. Hills Tragic Magic 137: Inmates hate guards – we call them bulls, hacks, COs, shit-heads, police.