(slang) To be insane, irrational, or eccentric.

plural of hex head screw

A screw, with a hardened thread, that forms its own internal thread when driven into a relatively soft material (such as sheet metal).

plural of self-tapping screw

(construction) A fastener that taps and drills its own hole during application.

A screw having threads upon the opposite ends which wind in opposite directions.

(slang, vulgar) Synonym of screw you

plural of right and left screw

plural of self-drilling screw

Alternative form of sod this for a game of soldiers