Electricity.
- alternating current or direct current.
adjective Slang.
- sexually responsive to both men and women; bisexual.
adjective
- informal (of a person) bisexual
electronics abbreviation of alternating current/direct current, by 1898. As slang for “bisexual,” 1959, said to have been in use orally from c.1940; the notion is of working both ways.