ac-dc

adjective Slang.

sexually responsive to both men and women; bisexual.

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

Dictionary.com Unabridged

Electricity.

alternating current or direct current.

Also, A.C./D.C., ac/dc, a-c/d-c, a.c.-d.c.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To AC-DC

00:10

Ac-dc is always a great word to know.

So is ninnyhammer. Does it mean:

a chattering or flighty, light-headed person.

a fool or simpleton; ninny.

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Collins

World English Dictionary

AC/DC

—*adj*
	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 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

AC/DC

"bisexual," 1959, said to have been in use orally from c.1940, from electronics abbreviation of alternating current/direct current.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang Dictionary

AC-DC definition

and AC/DC

mod.
bisexual. (Older. Initialism.) : I didn't realize at first that we were in an AC-DC bar! , He was reported to be “AC/DC” by a member of the press.

Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
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American Heritage

Abbreviations & Acronyms

AC/DC

alternating current/direct current
bisexual

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AC/DC