plural of screw thread

(engineering) A helical ridge formed around a cylinder, or a helical groove formed around the inner wall of a bore, used mostly on fasteners and their connection points.

(sports, billiards, snooker, pool) To cue the cue ball in such a way as to impart backspin. On impact, the ball will follow a reverse trajectory according to the spin.

simple past tense and past participle of screw the pooch (slang) (To have screwed up or to have made a mistake.)

present participle of screw off

To remove the lid of a jar or other container by unscrewing it. / (idiomatic, colloquial) To fail to do one's work; to goof off. / (idiomatic, colloquial) To leave; to bugger off.

(idiomatic, vulgar, dismissal) To tell someone to leave or to stop being bothersome. / (idiomatic, possibly vulgar) An expression of surprise or disbelief.

A slot in the head of a screw, of various shapes, enabling a screwdriver to lock into the screw.

present participle of screw over

A screw designed for a wood or a similar material, with a point, a relatively coarse thread, a thick shank, and, usually, an unthreaded portion of the shank at the head end.