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AC/DC

1 American  
[ey-see-dee-see] / ˌeɪ siˈdi si /

adjective

Slang.
  1. sexually responsive to both men and women; bisexual.


AC/DC 2 American  
Or A.C./D.C.,
Electricity.
  1. alternating current or direct current.


AC/DC British  

adjective

  1. informal (of a person) bisexual

"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

Etymology

Origin of AC/DC

1940–45, for an earlier sense; 1960–65 for this use