A screw is a type of fastener, in some ways similar to a bolt (see Differentiation between bolt and screw below), typically made of metal, and characterized by a helical ridge, known as a male thread (external thread). Screws are used to fasten materials by digging in and wedging into a material when turned, 90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent. Screw up definition , a mistake or blunder: The package was delayed through an addressing screwup. See more.
Noun. That was a major screwup . She's a screwup who can't hold down a job.. Verb. we all screw up from time to time, so don't sweat it you've totally screwed up the spreadsheet First Known Use of fuck . Verb. 14th century, in the meaning defined at intransitive sense 1. Noun. 1680, in the meaning defined at sense 1 a screw (often without a head) that fits into the boss or hub of a wheel or cam etc. and prevents motion of the part relative to the shaft on which it is mounted
This Slang page is designed to explain what the meaning of shit the bed is. The slang word / phrase / acronym shit the bed means. Online Slang Dictionary. A list of slang words and phrases, idioms, jargon, acronyms, and abbreviations. The distinction between a bolt and a screw heremonly misunderstood.  There are several practical differences, but most have some degree of overlap between bolts and screws.The defining distinction, per Machinery's Handbook, is in their intended purpose: Bolts are for the assembly of hereponents, with the aid of a nut. to secure (a nail, screw , etc.) in position by beating down the protruding point: He drove the nails through the board and clinched the points flat with a hammer.
A sane person doesn't have any screws loose — in other words, they're free of mental illness and in a reasonable state of mind.