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1) Many people think this means a gay man which is untrue, lets break it down back door meaning anal sex and daddy which is commonaly used as pimp. So it means anal sex pimp.

2) A guy that is not gay that does girls in the ass and take nothing up his ass.
1) HO 1: "Theres my back door daddy"
HO 2: "Theres my pimp, he dosen't like anal"

2) GUY : "I'm not gay but I like giving it to girls in the ass. Hoory! Ass!"
by BACK DOOR DADDY September 16, 2005
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