someone who has two penises, and one of them is evil.
"That guy is such a doppelbanger. He was doing me and slipped the evil dick up my butthole."

"But I liked it."
by Rick and Jesse March 15, 2007
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n. One who doppelbangs. One who continually has sex with similar or identical looking people.
That doppelbanger only fucks 400 pound greasy weightlifters.
by JonBron March 19, 2006
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Noun: A person that looks so much like your current boyfriend or girlfriend that it could not be considered cheating on them if you were to be caught (or not).

Someone that resembles your current or past relationship that you may have the urge to call them by the wrong name.

A person that looks so much like a celebrity, you may just get with them because of it.
"That chick he was with looked so much like Anna Faris, it could have been her Doppelbanger"
by DevilMan76 February 21, 2010
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A friend who has almost identical taste in sexual partners. Two people are doppelbangers if they share uncanny interest in multiple members of the opposite sex.
John and Tim both like Mary, Angela, and Kim. They have such similar taste they must be doppelbanger s.
by grimymonkey May 29, 2013
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An exact double of ones self who bangs ( has sex with ) people who are not their significant other.
Exampl #1
Wife: " I saw you F@*king Karen last night"
Husband: " Baby, that wasn't me, it must have been my Doppelbanger."
Example #2 " Dude I swear I saw my girl blowing some guy in that corvette, nah must be her doppelbanger"
by Awhellyea April 19, 2010
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Who you blame when caught cheating on your spouse/significant other.
Honey, I'd never cheat on you. It must have been my doppelbanger.
by smithering27 July 27, 2010
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realizing after the fact that you've just had sex with someone you'd slept with before... a sexual doppelganger
Samantha on Sex & the City once said to a man, mid-fuck, "Wait, a minute... I've fucked you before!"

That's a doppelbanger.
by Lisa January 30, 2004
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