present participle of screw the pooch

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.

A screw designed for metal or a similar material, usually with no point and a relatively fine thread, intended for prepared, threaded holes.

Having a fitting that screws into another part

An arrangement for producing slow motion in machinery, consisting of a screw whose thread gears into a wheel with skew teeth.

(engineering) A mechanism that uses two screw threads to make small, precise adjustments to the spacing between two objects, as in focusing a microscope or moving the anvils of a micrometer.

(nautical) A vessel with two propellers on separate shafts.

A machine for the manufacture of screws, typically either by carving a groove into a thick nail, or by welding a thread formed of wire to a thin nail.

(engineering) A screw for adjusting the distance between the stones in a grinding mill by raising or lowering the bridgetree.

(slang) A state of insanity or eccentricity. / (slang, archaic) A state of enmity or disagreement.