sexually responsive to both men and women; bisexual.
alternating current or direct current.
(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.


Practicing both heterosexual and homosexual sex; bisexual


: I think she does it AC-DC

[fr the abbreviations for the two types of electrical current, alternating and direct; an appliance that can operate with either type is marked AC-DC]
alternating current/direct current

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