Rat Shit is used to exclaim displeasure or uselessness/exhaustion. It is similar to fuck, in that is can be a Noun and a verb.
"You coming to the Pub? "
"Nah mate, I pulled a double shift and I'm absolutely rat shit."
"What happened to your car?"
"Mate my motor is rat shit, its blown a gasket and leaks so much oil the americans are giving me greedy looks."
"Hey, whats this thing?"
"Mate, that is rat shit. Dont waste your money."
"Nah mate, I pulled a double shift and I'm absolutely rat shit."
"What happened to your car?"
"Mate my motor is rat shit, its blown a gasket and leaks so much oil the americans are giving me greedy looks."
"Hey, whats this thing?"
"Mate, that is rat shit. Dont waste your money."
by aussieguy82 August 12, 2020
Get the Rat Shitmug. The lowest of the lows of the cairns species. Cairns rats usually reside in the beaches OR far south. They generally congregate at bus stops or centralz. They carry duffel bags and wear baggy shorts. They have that general ‘crusty’ and/or ‘greasy’ look to them that makes all the non-cairns rats spew. A cairns rat proba went to smithy but you’ll find they are pretty good at getting into the private schools round here too- you’ll find some at TAS. If your a cairns rat you stay in cairns after graduating (if u even graduated u probs just dropped out after grade 10) and live with ur parents and eventually become a tradie with a mullet- this is not to be confused with a eshay which is a notably different breed.
by CairnsRat4060 October 31, 2020
Get the Cairns ratmug. 
A male or female that wears rompers every weekend and regularly gets sloppy drunk and sleeps with a different partners every time. Usually loud, sloppy and easy. Most commonly found on a campus usually in a sorority/fraternity.
by Maybe Miike November 13, 2017
Get the romp ratsmug. A person, usually female, who lives in government housing, with many kids and only means of income is child support. Also known as "trap hoe".
by Pwning30 November 25, 2021
Get the Project ratmug. a pretty cool person who loves theater and its a lifestyle. they make lots of musical references even if you don't understand and constantly burst into song. it's contagious and soon you as well will burst into song. if its a female then they generally are super sweet and for the male species not only are they likely gay but honestly kinda hot... a theater rat can also have a cute nickname as "pip-squeak" and if they like cheese to be sure to bring it up at least once.
by goat=isa=isableh=isabelle=tras April 21, 2020
Get the theater ratmug. by deck rat June 13, 2015
Get the deck ratmug.