crazy,nasty
Ratchet means that someone is dirty,nasty,ghetto etc
If someone is ratchet, that means they are ghetto
Rude, disrespectful, will do anything, uncouth, foul mouth
Ratchet means somebody who is rude, full of themselves or, trashy. Your clothes can look ratchet as in; 1. Holes and rips not meant by the designer 2. Very dirty or dingy To act ratchet is to; 1. Being loud and obnoxious 2. Starting fights and generally rude 3. Believing you are better than everyone and everything
A ratchet is a device whereby a wheel or axle is allowed to turn one way but not in the opposite way. Ratchets are useful for tightening straps and ropes, and for tightening screws and bolts without removing the wrench or screwdriver between turns.
it means crazy and ugly
If you mean slang as in internet slang, then it means "Certified Old Fart".
I am not certain what you mean by "ratchet" -- I have never heard of this term used to describe a person before. A ratchet is a machinery device.
Slang is slang It's the s' "LANG " uage.
In old slang, milkshake mean butt.
Hoodrat
If you mean "How do you get to the HIG Treehouse in Ratchet and Clank Size Matters and Secret Agent Clank, consult the Ratchet and clank wiki.