Green’s Dictionary of Slang

shitfuck! excl.

a general excl.

1970		J. Bouton Ball Four 199: ‘Oh shitfuck,’ Joe Schultz said [...] ‘Oh fuckshit’.
1972		J. Wambaugh Blue Knight 243: ‘Shitfuck,’ grumbled the clerk.
1998		D. Hecht Skull Session 179: Shitfuck!
2005		A. Lovejoy Acid Alex 217: Shitfuck, there’s not enough blood. I fucked up.
2023		(con. 1962) J. Ellroy Enchanters 86: Deedee went Shit and Shitfuck.