1. A type of wrench used to crank down or unscrew nuts and bolts.

2. The word "wretched" as spelled and pronounced by the uneducated.
1: That girl is hella ratchet!..

2: No. You mean to say she's "wretched". Ratchet is a type of wrench. Another acceptable word you could've used is "skanky" or "whorish."
by Jon Solo March 8, 2014
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The Medical Officer from Transformers, not a disgusting human being.
Optimus Prime "My Medical Officer, Ratchet." Ratchet "Hmm, the boys pheromone level suggests he wants to mate with the female." Transformers 1, when the other autobots arrive.
by MichaelS125 April 14, 2014
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adj. a term for someone who is either 1. a whore 2. dirty/nasty 3. ghetto as HELL 4. being annoying 5. busted
Example 1:
*whore/ obvious prostitute walks by*
friend: she mad ratchet!!!
other friend: i know right ew

Example 2:

*kid being annoying*
girl: you bein mad ratchet!
boy: no u ratchet
*and it goes on for like 10 minutes

Example 3:

* busted car drives by *

girl: that is the most ratchet-ass car i've seen
boy: i'm glad we dont have one like that
by damn.she.ratchet<3 August 24, 2012
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adjective. a person (or activity) that is in general, over the top, out of control hood/ghetto, gritty, and unapologetically so

antonym. bourgeois
Example:

Hurricane Chris.

In a sentence:

"I live for 1/2 off drinks on Big Booty Tuesdays. I'm so ratchet!"
by baptastic December 6, 2012
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Ratchet is....
1. a wrench
2. the main character from the Insomniac video game series, "Ratchet And Clank"
3. a musical instrument that makes a scraping noise
1. This ratchet does not work on this car gear.
2. DARN IT RATCHET, JUST KILL THAT ROBOT!
3. This ratchet is so noisy!
by GLaDOSPORTAL3WANt! April 30, 2014
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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
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The term 'ratchet' has no less than two distinct meanings. As an adjective, it describes a person, usually a woman, or activity, who is out of hand, out of control, generally whack in some way, dirty, ghetto, unattractive, Crucian, or just generally disliked. As a verb, or a direct object ("do tha ratchet, yeah, do tha ratchet..."), the term serves to identify or describe the dance craze--and the movements associated herewith-- of the Ratchet.
A person, usually a woman, who is dirty, ghetto, unattractive, or just generally disliked.
"Man, did you see that chick?!"
"Oh, her? Yeah, man she's ratchet."
by ratchet R us April 30, 2012
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