A mispronunciation of "Rat-Shit". Typically used by Australia youth as a localised version of the American equivalent, which refers to ghetto-trash and ghetto-trash-want-to-be persons of the female variety.
You look like ratchet mate.

Urgh. I drank too much last night. I feel ratchet.
by Crocodile Dungoofed December 19, 2013
Diminutive of "wretched": of poor character; nasty; dirty; foul; morally reprehensible.
It's just a matter of time before these ratchet kids you hanging with get you in trouble.
by pseudoraphael December 02, 2014
A type of lockback folding knife originally from Germany. These are very popular in much of the Africa and much of the Caribbean. Ratchet Knives are often associated with gangs and criminal activity. In Jamaica they were closely linked with "Rude Boy" street culture.
Ratchet Knives are named for the ratcheted blade lock mechanism.

The ratcheted blade lock mechanism keeps the blade from snapping shut on the user's hand even when only partially opened. The ratchet knife is usually unlocked by using a pull ring on the back rather than the more common push buttons or levers of most lock blades.
Both of these features make it less likely for the knife to snap shut across the user's fingers during a struggle.

However the key to the popularity of these knives is mostly due to their extremely low price, wide availability and intimidating ratchet sound on opening.
The most famous brand of ratchet knife is the Okapi. Originally made in Germany for export to German territories in Africa the production of Okapi knives moved to South Africa during the 1980's where it is still a very popular all around knife, especially with local criminals.
The Okapi was also the favored ratchet of Jamaican rude boys who often referred to them as "Three Star Ratchets" due to the three stars inlaid on the handles of many Okapi brand ratchet knives.
"Walking down the road, With your ratchet in your waist, Johnny you're too bad"

-Johnny Too Bad, The Slickers
by teaserpent December 27, 2014
a tool used for assembling and maintenance on an automobile, not at term used to describe a slut
Nichole: that's ratchet

Jamie: no, a ratchet is a tool
by Xbow Nation November 08, 2014
A mispronunciation of "wretched" that grew to be it's own word and meaning.

A diva, mostly from urban cities and ghettos, that has reason to believe she is every mans eye candy. Unfortunately, she's wrong.

Typical signs to beware of include, but are not limited to:

-owning a Blackberry

-BLARES anything by Drake, 2Chainz, Nicki Minaj, Gucci Mane, Waka Flocka, Lil Wayne, T-Pain, Cali Swag District, or any other garbage entertainment rapper

-rowdily quotes "lyrics" from aforementioned artists

-has a weave reminiscent of a bird's nest after a tempest hit the tree it was in, and is dyed at least thrice

-wears torn leggings/stalkings (mostly of the fishnet variety), unpolished 8" heels (or higher, depending on how God-awful they look), fitted jean jackets (to accent the blubber 'round their arms and stomach), and 4 layers of caked on make-up to go clubbing

-repeatedly use ludicrous terms such as "YOLO", "swag", "boost", "beaking", "doe", "really", "naw", "actually", "twerk", "coaster", "dagga", etc., to make a valid statement when they speak

-have side bangs, despite having incredibly small-ass foreheads to support them

-are commonly overweight

and are mind-numbingly stupid; a safe assumption to make would be saying they're uneducated (as if they could pass the 4th grade)

If spotted, please report to the authorities, notifying them that they are possible smack addicts, or potential, degenerate Chaka Khan look-alikes.
Imagine a woman that wears skinny clothes, bad looking heels & fishnet stalkings, blasts Drake or Waka off her phone, would go out of her way as to cop CD's from these artists, has a bad hairdo, looks immensely disgusting as a human being, and would rather spend her time maintaining her looks, communicating among her folk, and being a jobless, gold-digging bum for the rest of her days, not even bothering to get herself a good shower, a paying career, and a damned effort to earn a diploma.

That, my comrades, is a prime notoriety of a ratchet.

God help us all.
by tortilla_machine June 15, 2014
Used by dumb women to explain other ugly nasty women. The real use of the word is in reference of a tool.
Serena tells Sam that bitch is ratchet.
by LB9591 March 29, 2014
A dirty girl that thinks she's cute. She moves from guy 2 guy without even stopping 2 douche.

She has 4 different kids from 4 different guys. She doesn't work, sleeps til noon & waits 4 that welfare every month.
I can't stand that ratchet ass bitch! Ugh!
by C.M.B IN AZ February 16, 2015

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