or A.C./D.C., ac/dc, a-c/d-c, a.c.-d.c.
- alternating current or direct current.
- sexually responsive to both men and women; bisexual.
Origin of AC/DC
1940–45, for an earlier sense; 1960–65 for this use
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- informal (of a person) bisexual
C20: humorous reference to electrical apparatus that is adaptable for alternating current and direct current
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for ac-dc
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.
Online Etymology Dictionary, © 2010 Douglas Harper