From Wiktionary, the free dictionary
From shit + piss.
shitpiss (not comparable)
- (vulgar, slang, sometimes derogatory) Used in the same context as many vulgarities and slang, including fuck, fucking, hell, etc.
shitpiss (plural not attested)
- (vulgar, slang) Nonsense, bullshit.
- (vulgar, slang, derogatory) Term of abuse.
- (vulgar, slang) Severe diarrhea.