Some Body That You See On The Side. May Be While You Are In A Relationship (Serious).
Person 1.: Who Is He

Person 2.: He Jus A Back Door Guy
by Immaculant Cole August 13, 2009
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When smoking weed one calls back door and after the person loading the bowl takes his/her first hit the person who calls back door gets next hit, and the rotation goes from there.
Person 1: I call back door.
Person 2: No I already called back door when we were in the car. :
Person 1: Awww fuck.
by Emphazima November 15, 2007
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When someone you trust sneakily takes your girl, job, friends.
He was my friend and then totally back doored me with my girl
by Yadf January 7, 2017
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1. while freestylin with your homies and you boi falls off you continue from where he left off..thus back door

2. when you or sombody go right behind sombody else back and holla at there girl
maan dat negro just back doored me on the slide
by skylar April 25, 2004
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