Green’s Dictionary of Slang

1. unpleasant, disgusting, annoying.

1988		McGill Dict. of Kiwi Sl. 92/1: ratshit no good [...] ‘This tucker is ratshit.’.
1998		D. Hecht Skull Session 172: Little ratshit creepoid!
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].
2003		McGill Reed Dict. of N.Z. Sl. 170: ratch/ratshit [...] A ratshit attitude is one you deplore, as in a surly teen who lives in squalor, who for his or her part doesn’t give a ratshit, or does not care at all.

2. of individuals and objects, inefficient, malfunctioning, useless.

1973		D. Williamson What If You Died Tomorrow (1977) I i: She used to have some sort of spark; but the word around the industry is that she’s gone ratshit. [Ibid.] II i: Your remedies are ratshit.
1973		Tharunka (Sydney) 8 Nov. 28/2: A ratshit scraped and beat up green and white Renault pulls up outside the Fisher Library.
1976		D. Ireland Glass Canoe (1982) 46: ‘You’re RS these days, if you’re old. You’ve gotta be young.’ RS means ratshit, I think it tells the story.
1985		B. Robinson Aussie Bull 45: Absolute Bull and completely RS.
1988		B. Humphries Complete Barry McKenzie 12: Me ticker’s ratshit according to that Sydney quack.
1996		Penguin Bk of More Aus. Jokes 112: The car’s ratshit. Can you have a look at it?
2000		P. Temple Dead Point (2008) [ebook] Bloody owners. First they love the trainer, then the trainer’s ratshit.
2001		(con. 1945–6) P. Doyle Devil’s Jump (2008) 63: I used to get [water] from the tap in the backyard. But that’s RS.
2003		McGill Reed Dict. of N.Z. Sl. 170: ratch/ratshit Feeling horrible from booze or ill health, or person or object such as food or machinery attracting disapproval as incompetent or unpleasant.
1996		(con. 1950s) in P. Doyle Get Rich Quick (2004) 14: He [...] turned back to me to launch a big swing, and I knew I was ratshit.
2007		S. Maloney Sucked In 268: You sound ratshit, Murray [...] Hit the turps at the big event, did you?