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"
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.