1. tv. & in. to copulate [with] someone. (Very old. Usually objectionable.) The sailor wanted to screw somebody bad.
2. tv. & in. to cheat or deceive someone. You can count on somebody screwing you at a traveling carnival.
3. n. an act of copulation. (Usually objectionable.) The sailor said he needed a good screw.
4. n. a person with whom one can copulate. (Usually objectionable.) His teeth are crooked and his hands are callused, but he’s a good screw.
5. n. a jailer. (Very old. Underworld.) See if you can get the screw’s attention.