Devious sexual practice where one man has intercourse with a woman, while another man has sex with the man that is having sex with the woman, thereby "fucking" the woman "by proxy." Definition can be extrapolated to any situation where one person uses another person to "fuck" somebody.
Administration is totally using Human Resources to proxy fuck us out of our jobs.
by El Mochilero May 25, 2008
Having sex with a stranger that looks convincingly enough like a person you are in regular contact with, such as a friend, colleague or family member.
(Verb) Greg felt triumphant after proxy fucking his colleague Debbie.
by It'sLDawgBrah July 25, 2014