Etymology
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screwdriver (n.)

also screw-driver, "tool like a blunt chisel which fits into the nick in the head of a screw and is used to turn it," 1779, from screw (n.) + driver. Meaning "cocktail made from vodka and orange juice" is recorded from 1956. (Screwed/screwy have had a sense of "drunk" since 19c.; compare slang tight "intoxicated," or perhaps the notion is "twisted").

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Definitions of screwdriver

screwdriver (n.)
a hand tool for driving screws; has a tip that fits into the head of a screw;
screwdriver (n.)
a cocktail made with vodka and orange juice;
From wordnet.princeton.edu