Where did the term screw come from?
screw as a term for a prison guard is based on the fact that screw was originally slang for "key." One of the most important functions of a prison guard, or turnkey, as he's often called, is to see that prisoners are locked up at the appropriate times -- and that involves turning the "screw."
(vulgar) A slightly less offensive version of fuck you. You'll just lie in your bed all day rather than help us? Well, screw you. Screw you—go annoy someone else! Screw you!
- With regard to the second part, whether I'm screwed is "used when someone tries to say they made a mistake": I think you're confusing I'm screwed (which as the comments tell you means approximately "Aw, jeez, I'm in trouble") with I screwed up, which does mean "I've made a mistake".
- Definition of mess up. informal. : to make a mistake : to do something incorrectly. About halfway into the recipe, I realized that I had messed up, and I had to start over.
- (transitive) To cause a problem with; to introduce an error or mistake in; to make muddled or confused; spoil; ruin. (transitive) To cause (another person) to make unwanted mistakes in a given task, usually through distraction or obnoxious behavior. Stop bumping me! You keep messing me up!
Screwed over means someone does something to another person to leave them in a bad situation. For example, someone lying about another person or telling on another person so that they get in trouble is getting screwed over.
- windmill, fan (wheel and axle)
- roller coaster, stairs (inclined plane)
- sledge hammer, chisels (wedge)
- door lock, drill (screw)
- flag pole, window blinds (pulley)
- seesaw, rake (lever).
- A shovel is actually a compound machine (a combination of multiple simple machines). It is composed of a wedge and a lever. The wedge is the blade of the shovel.
- In a first class lever system, the fulcrum or pivot point is located on the lever between the effort force and load or resistance being moved.
Machines that use screws to push against other objects are called presses. A press is used to make cider or wine by squashing fruit to extract the juice from it. Printing presses were also used to make books. The up and down force generated by a screw can also be used to hold things together.
- A screw is a device which converts rotational forces into linear motion. A screw has a core about which is wrapped a spiral surface. In the surgical context, most screws have a screw-head, the function of which is discussed later. Most surgical screws are made of either stainless steel or titanium.
- A screw is a mechanism that converts rotational motion to linear motion, and a torque (rotational force) to a linear force. It is one of the six classical simple machines. Geometrically, a screw can be viewed as a narrow inclined plane wrapped around a cylinder.
- Usually the term refers to the six classical simple machines which were defined by Renaissance scientists:
- Wheel and axle.
- Inclined plane.
Updated: 2nd October 2019